The function of the one-way valve is to effectively charge and discharge the gas in the tire and help maintain the air pressure inside the tire.What the product can offer you are the easy installation and simple use, because it has detachable valve core design, removal tool, and the design that the sealant can be injected.Choosing premium aluminium alloy material, the product is durable, sturdy, anti-rust, and lightweight.The length of the product is 5.1cm, the width is 1cm, and the height is 1cm. The length of the valve stem is 40mm, and the overall length is 55mm.It is suitable for road bikes and most bicycles with tubeless rims and wheels.Item Name: Cycling Tubeless Valve StemMaterial: Aluminum AlloyColor: Green, Black, Blue, RedInstallation Method: Screw-onInstallation Location: Tire ValveApplicable Model: Road Bikes And Most Bicycles With Tubeless Rims And WheelsFeatures: Compact, Anti-rust, Anti-corrosionSize Details: Product Size: 5.1cm x 1cm x 1cm/2.01" x 0.39" x 0.39" (Approx.)Valve Stem Length: 4cm/1.57" (Approx.)Overall Length: 5.5cm/2.17" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension differences due to different manual measurements.Before buying, please check carefully whether it is compatible with your wheels to prevent misfits later.Installation Steps:1. Check whether the spool valve is tight.2. Remove the lock nut and O-ring.3. Pass the valve stem through the valve hole on the edge.4. Place the O-ring on the stem.5. Screw the lock nut onto the valve stem.6. Tighten the lock nut until the rubber end of the valve is tightened in the valve hole of the rim.Package Includes:2 x Cycling Tubeless Valve Stem1 x A-Shaped Wrench