Fin for Surf Us Boxes of 2025
Best Choice1
WaydooWaydoo US Fin Box Mount Board Bracket for Hard Paddleboard,Hardboard, Subnado Underwater Scooter
Main highlights- The fin box mount is designed for stand up paddle boards, hardboards.
9.9Exceptional
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Value for Money2
air7Air7 Fin Box for Inflatable SUP, Stand Up Paddleboards, Surfboards, Standard US Box for Replacement, Repair and All Board Upgrades, Printed Manual Video Instructions How to fix! (Dark Red - Black)
Main highlights- TOUGH POLYCARBONATE PLASTIC, to see how we test, search YouTube for “air7 fin box testing”, we also have instructional videos showing how to install , repair , replace or upgrade your SUP.
- PVC FABRIC ATTACHED, the fin box is ready to install on your inflatable SUP as a replacement or upgrade part, you only need to supply the PVC glue: apply glue to both SUP and the PVC attached to the box, wait a few minutes and press together, smooth out bubbles with a mallet or handle of a screw driver.
- GLUE IS NOT INCLUDED : please use the PVC glue that came with your SUP's repair kit, sorry we cannot include glue as it's not able to be posted via air express or stored at the warehouse. Glue may also be available at local PVC boat retail shops or some hardware stores.
- GENUINE AIR7 FIN BOX (V2) : the industry standard since we introduced it in 2010, we are the manufacturer and trademark owner of AIR7 products! US box is used on most leading brand inflatable SUP and surfboards, go with the industry leader : Genuine AIR7 !
- COMPATIBLE WITH: most US box fins including all saruSURF brand fins including 3" and 4.6" river fins, 8 and 9" surf fins, and 9" and 10" SUP race / cruising fins!
9.7Exceptional
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3
saruSURFUS Box Center River & surf SUP fin Safety Flex Soft 3" for SUP Longboard airSUP saruSURF - Black
Main highlights- STAINLESS STEEL FIN SCREW saruSURF brand US box center fin, fin screw included, no need to screw drivers, adjust your in position (forward, backward, take it off) anytime even out on the water! 8" long fin base if your fin box cavity is not 8" this fin will not fit PLEASE measure your fin box BEFORE you buy
- SAFETY FLEX SOFT 3" FIN - under most conditions : impossible to break , 12 month warranty , we call the fin "findestructible" ! 8" long fin base if your fin box cavity is not 8" this fin will not fit PLEASE measure your fin box BEFORE you buy
- GREAT FOR SURFER AND ADVANCED SUP : surf dumping shore breaks, shallow reefs. On your SUP : challenge white water, low level streams, river runs and fly fish in shallow lakes. This fin is flexible , in most conditions will not break, and less likely to break out your board's fin box! 8" long fin base if your fin box cavity is not 8" this fin will not fit PLEASE measure your fin box BEFORE you buy
- GREAT FOR BEGINNER AND KIDS : 1st time surfing can be dangerous, usually the fin is the sharpest part of you board, with this fin you can feel safer - the fin will bend and flex more and is harder to hurt yourself and others 8" long fin base if your fin box cavity is not 8" this fin will not fit PLEASE measure your fin box BEFORE you buy
- FOR LONGBOARD , SUP AND INFLATABLE SUP ( inflatable sup boards with air7 fin box or US box - contact us to confirm if not sure) suitable for use with most longboard / (stand up paddle) SUP / airSUP. most long board and stand up paddleboards use the universal fin system, which can take this replacement fin. 8" long fin base if your fin box cavity is not 8" this fin will not fit PLEASE measure your fin box BEFORE you buy
9.6Exceptional
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4
saruSURFsaruSURF 4.6" US Box Center fin Safety Flex Soft Replacement for Longboard SUP Stand up Paddleboard River Surf Whitewater airSUP AIR7 Skeg (Yellow)
Main highlights- note: STAINLESS STEEL FIN SCREW is NOT included, so you can save money if you already have one !
- SAFETY FLEX SOFT 4.6" FIN - under most conditions this gummy fin is impossible to break , 12 month warranty , we call the fin "findestructible" !
- GREAT FOR SURFER AND ADVANCED SUP : surf dumping shore breaks, shallow reefs. On your SUP : challenge white water, low level streams, river runs and fly fish in shallow lakes. This fin is flexible , in most conditions will not break, and less likely to break out your board's fin box!
- GREAT FOR BEGINNER AND KIDS : 1st time surfing can be dangerous, usually the fin is the sharpest part of you board, with this fin you can feel safer - the fin will bend and flex more and is harder to hurt yourself and others
- FOR LONGBOARD , SUP AND INFLATABLE SUP ( inflatable sup boards with AIR7 fin box or US box - contact us to confirm if not sure) suitable for use with most longboard / (stand up paddle) SUP / airSUP. most long board and stand up paddleboards use the universal fin system, which can take this replacement fin.
9.5Excellent
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5
saruSURF4.6" US Box Center fin Safety Flex Soft Replacement for Longboard SUP Stand up Paddleboard River Surf Whitewater airSUP AIR7 by saruSURF (Yellow)
Main highlights- STAINLESS STEEL FIN SCREW (included with this fin) saruSURF brand US box center fin screw, no need to screw drivers, adjust your in position (forward, backward, take it off) anytime even out on the water!
- SAFETY FLEX SOFT 4.6" FIN - under most conditions this gummy fin is impossible to break , 12 month warranty , we call the fin "findestructible" !
- GREAT FOR SURFER AND ADVANCED SUP : surf dumping shore breaks, shallow reefs. On your SUP : challenge white water, low level streams, river runs and fly fish in shallow lakes. This fin is flexible , in most conditions will not break, and less likely to break out your board's fin box!
- GREAT FOR BEGINNER AND KIDS : 1st time surfing can be dangerous, usually the fin is the sharpest part of you board, with this fin you can feel safer - the fin will bend and flex more and is harder to hurt yourself and others
- FOR LONGBOARD , SUP AND INFLATABLE SUP ( inflatable sup boards with AIR7 fin box or US box - contact us to confirm if not sure) suitable for use with most longboard / (stand up paddle) SUP / airSUP. most long board and stand up paddleboards use the universal fin system, which can take this replacement fin.
9.3Excellent
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6
air7air7 Fin Box for Inflatable SUP, Stand Up Paddleboards, Surfboards, Standard US Box for Replacement, Repair and All Paddle Board Upgrades, Printed Manual and Video Instructions How to fix! (Dark Red)
Main highlights- TOUGH POLYCARBONATE PLASTIC, to see how we test, search YouTube for “air7 fin box testing”, we also have instructional videos showing how to install , repair , replace or upgrade your SUP.
- PVC FABRIC ATTACHED, the fin box is ready to install on your inflatable SUP as a replacement or upgrade part, you only need to supply the PVC glue: apply glue to both SUP and the PVC attached to the box, wait a few minutes and press together, smooth out bubbles with a mallet or handle of a screw driver.
- GLUE IS NOT INCLUDED : please use the PVC glue that came with your SUP's repair kit, sorry we cannot include glue as it's not able to be posted via air express or stored at the warehouse. Glue may also be available at local PVC boat retail shops or some hardware stores.
- GENUINE AIR7 FIN BOX : the industry standard since we introduced it in 2010, we are the manufacturer and trademark owner of AIR7 products! US box is used on most leading brand inflatable SUP and surfboards, go with the industry leader : Genuine AIR7 !
- COMPATIBLE WITH: most US box fins including all saruSURF brand fins including 3" and 4.6" river fins, 8 and 9" surf fins, and 9" and 10" SUP race / cruising fins!
9.2Excellent
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7
Boost SurfingBoost Surfing Longboard Adapter (US Fin Box)
Main highlights- Premium Plastic Material: The fin adapter is made of durable nylon and high-quality plastic materials, ensuring sturdiness, resistance to abrasion, deformation resistance, and long-lasting durability.
- Easy Installation: The fin adapter can be easily installed without excessive effort.
- Compatibility: The fin adapter is designed for the Boost Fin and Boost Fin Long Range models.
9.1Excellent
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8
saruSURFsaruSURF 9" US Box Center fin Safety Flex Soft Replacement for Longboard SUP Stand up Paddleboard River Surf Whitewater airSUP AIR7 Skeg with 'No-Tool' Fin Screw (Green)
Main highlights- STAINLESS STEEL no tool FIN SCREW included, saruSURF brand US box center fin, fin screw included, no need to screw drivers, adjust your in position (forward, backward, take it off) anytime even out on the water!
- SAFETY FLEX SOFT 9" FIN - under most conditions : impossible to break , 12 month warranty , we call the fin "findestructible" !
- GREAT FOR SURFER AND ADVANCED SUP : surf dumping shore breaks, shallow reefs. On your SUP : challenge white water, low level streams, river runs and fly fish in shallow lakes. This fin is flexible , in most conditions will not break, and less likely to break out your board's fin box!
- GREAT FOR BEGINNER AND KIDS : 1st time surfing can be dangerous, usually the fin is the sharpest part of you board, with this fin you can feel safer - the fin will bend and flex more and is harder to hurt yourself and others
- FOR LONGBOARD , SUP AND INFLATABLE SUP (all brand inflatable sup boards and foam surfboards with AIR7 fin box or US box - contact us to confirm if not sure) suitable for use with most longboard / (stand up paddle) SUP / airSUP. most long board and stand up paddleboards use the universal fin system, which can take this replacement fin.
8.8Very Good
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9
saruSURFsaruSURF 9" Longboard Paddleboard US Box Center Hard fin for Race Cruise Touring Fishing Surf SUP (Black Reverse (no Screw inc.))
Main highlights- saruSURF SUPERIOR DEIGN : raked foil, designed to cut through weeds and kelp - helps you can keep on paddling! (note: FIN ONLY - perfect for those who have screws - save money! (fin screw is not included, "no tools" fin screws can be ordered separately))
- SUITABLE FOR most longboard / (stand up paddle) SUP / airSUP / Air7 Fin Box / US Fin box / Center fin Box / river SUP / Race / Cruise / downwinder - contact us anytime if you are unsure if this fin will fit your board
- REVERSE TOURING FIN 9" (fin screw tab at the back): for US Box / center box, fin screw not included with this fin (please choose the fin with screw if required from our other listings, or ask us for help)
- HARD NYLON PLASTIC almost as hard as fiberglass but much cheaper and lighter!
- GOOD CHOICE FOR : replacement or alternative when you end your expensive board to friends! also good for hire / resort / school
8.7Very Good
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10
saruSURFsaruSURF 8" US box center fin Safety Flex Soft replacement for longboard/SUP/Stand up Paddleboard/River/Surf/Whitewater/airSUP / AIR7 Blue
Main highlights- STAINLESS STEEL no tool FIN SCREW saruSURF brand US box center fin, fin screw included, no need to screw drivers, adjust your in position (forward, backward, take it off) anytime even out on the water!
- GREAT FOR SURFER AND ADVANCED SUP : surf dumping shore breaks, shallow reefs. On your SUP : challenge white water, low level streams, river runs and fly fish in shallow lakes. This fin is flexible , in most conditions will not break, and less likely to break out your board's fin box! BLUE, with a SCREW !
- GREAT FOR BEGINNER AND KIDS : 1st time surfing can be dangerous, usually the fin is the sharpest part of you board, with this fin you can feel safer - the fin will bend and flex more and is harder to hurt yourself and others
- FOR LONGBOARD , SUP AND INFLATABLE SUP ( inflatable sup boards with air7 fin box or US box - contact us to confirm if not sure) suitable for use with most longboard / (stand up paddle) SUP / airSUP. most long board and stand up paddleboards use the universal fin system, which can take this replacement fin.
- BLUE SAFETY FLEX SOFT 8" FIN - under most conditions : impossible to break , 12 month warranty , we call the fin "findestructible" !
8.6Very Good
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