Stem Unders 25 of 2025
Best Choice1
WisscoolWISSCOOL 50PCS 1/4” HAVC AC Schrader Access Service Valve 1/4'' SAE x 1/4'' OD x 2.5'' Stem Core AC Refrigeration Kit for Vacuum System Refrigerator Charging (No Box)
Main highlights- [Wide Application] This access valve is designed to offer convenient access port for refrigeration system, it can be installed in any position on either high or low side for quick testing.Fit for many refrigeration and air conditioning systems, perfect for recharging with refrigerant such as R12 R22 R134 & R304 and other popular refrigerants.
- [Premium Schrader Valve Kit] This 50-piece set includes high-quality 1/4” SAE x 1/4” OD Schrader valves with 2.5” stems, designed for vacuum systems, refrigerant charging, and AC repairs.Durable brass construction ensures leak-proof performance under high-pressure conditions.
- [Package Includes]: 50 x 1/4” Schrader Access Valves (1/4” SAE x 1/4” OD x 2.5'' Stem), 50 x Pre-Installed Valve Stem Cores
- [High Quality Parts] The cap and 0.06mm thickened valve body are made of premium copper, which are corrosion-resistant metal. They have an inside thickened rubber O-ring, gas tightness tested before shipping.
- [Core and Cap Design] The valve core is engineered as a precision poppet valve mechanism, reinforced by a high-tension spring that ensures rapid sealing and consistent pressure control. Each valve has a portable cap with valve core remover.
9.8Exceptional
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Value for Money2
WaceceWacece ATV Tire Tube, 25x8-12 25x9-12 25x10-12 Inner Tube with TR6 Valve Stem Universal for Most ATV UTV, Butyl Rubber Material
Main highlights- Simple Installation: Just remove the original tire, take out the outer tire, and then take out the inner tube after deflation to replace it. Some professional tools may be involved to avoid damage to the tire, and professional installation is recommended.
- Sealed Air Nozzle: TR6 air valve is used, the periphery is sealed by vulcanization process, and the air tightness is guaranteed. There are valve locking nuts for added protection, which can also have good grip under low pressure.
- High-quality Material: Made of butyl rubber, the inner tire tube has good thermal stability, airtightness and water tightness, making it ideal for long-term outdoor use.
- Fits More: The tire tube fits many 11/12-inch tires, in addition to ATV and UTV, can also be installed on Trailers, Golf Carts, Zero Turn Lawn Mowers, Quad bikes.
- Fitment: This ATV tire tube is suitable for 25x8-12, 25x9-12, 25x10-12, and is also suitable for 23x8-11, 23.5x8-11, 23x9-11, 23x10-11. It can be adapted to most ATV UTVs on the market.
9.6Exceptional
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3
STEM InventionsSTEM Craft Kit - 25 Engineering Project Ideas and Over 400pcs of Craft Wood, Propellers, Wheels, Hot Glue, Hydraulics and More Supplies for DIY Kids' Projects
Main highlights- Tons of Supplies: This kit contains a variety of fun and versatile supplies, including plastic wheels, propellers, wood crafts, plastic syringes for hydraulics, hot glue, and masking tape. Build propeller powered vehicles, wood glider cars, robotic hands, bridges, catapults, and more!
- STEM Kit for Kids: Includes 25 engaging projects that spark creativity and teach real-world science, engineering, and motion principles using hands-on materials.
- Make it STEAM: Turn this STEM kit into a STEAM kit by adding your own creative touch. Decorate your designs and personalize them to blend science and engineering with art.
- Kid stem kits: Ideal for homeschoolers, classrooms, or at-home play—these kits keep young minds active and entertained with immersive challenges.
- In addition, a free curriculum download is available for teachers, educators, and homeschool families who want to facilitate STEM activities with their classes and kids. This resource focuses on explaining the main science and engineering principles that are behind the project through experiential learning.
- High-res video and picture instructions - All project plans are on a snappy, kid-safe site. To serve different learning styles, each project plan includes both step-by-step picture instructions and video instructions. No paywall or passcode, all project plans are freely available to anyone with an internet connection.
9.5Excellent
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4
Callisto Kids27% OffReal Engineering Experiments: 25+ Exciting STEAM Activities for Kids (Real Science)
9.3Excellent
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5
Odd Dot12% OffFairy Tale Science: Explore 25 Classic Tales Through Hands-On Experiments
9.9 Giftable9.9 Instruction9.7 for startersWhy we love it
Combines fairy tales with fun, educational STEM projects.
Engages children and adults alike in scientific exploration.
Ideal for classrooms and stimulating kids' interest in science.
9.2Excellent
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6
Chicago Review Press30% OffJunk Drawer Engineering: 25 Construction Challenges That Don't Cost a Thing (3) (Junk Drawer Science)
8.9Very Good
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7
Kewig15% OffKewig Motorcycle Fork Stem Phone Mount, Motorcycle Phone Mount, 1S One-Push Automatically Lock & Release, Fits for Fork Stem 12-25.4mm in Diameter, for 4.0-6.9" Cellphones
9.9 Easy installation9.7 Durability9.3 Vibration IntensityWhy we love it
Easy one-handed operation and quick release.
Sturdy and secure, even on bumpy roads.
Wide compatibility with various phone sizes.
8.8Very Good
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8
DymoeceDymoece Adjustable Bicycle Stem Computer Mount for Garmin Edge 25 130 200 500 510 520 800 810 820 1000 1030 (Red)
Main highlights- Recommended Use: cross-country, enduro, road cycling etc
- Lightweight about 16.5g,sturdy and durable
- Compatibility:Garmin Edge 25 130 200 500 510 520 800 810 820 1000 1030,Garmin Touring,Garmin Touring Plus
- Angle adjustment, easy to install
- Aluminum alloy 6061-T6 material
8.7Very Good
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9
FOMTORFOMTOR 31.8mm Adjustable Stem 110mm 0~60 Degree UNO 31.8mm MTB Adjustable Handlebar Stem for Most Mountain Bike Road Bike (Fit for 1.25'' Handlebar)
9.9 Easy installation9.5 Comfort8.7 lasts a long timeWhy we love it
Adjustable angle for personalized comfort and riding posture.
Easy installation with secure four-bolt bar clamp.
Lightweight, durable construction with high-strength aluminum alloy.
8.6Very Good
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10
Harry N. Abrams23% OffRube Goldberg's Big Book of Building: Make 25 Machines That Really Work!
8.5Good
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