2PCS Bicycle Tubeless Presta Valves Stem Aluminum Alloy 40mm Bike Vacuum Tire Nozzle Portable Alloy Kit Increase Friction Prevent Air Leakage Presta Nozzle Nut with Valve Caps

About this item Bicycle Tubeless Presta Valves Size: Length: 2.28 Inch (58mm), Effective length: 1.57 Inch (40mm), lock nut width: 0.47 Inch (12mm), Air valve cover: 0.59 Inch (15mm), Weight: 0.48 oz. Material: High quality aluminum alloy. The base is made of air-tight silicon material and high-strength aluminum alloy material, which is light in weight, corrosion-resistant and not easy to deform. Surface Treatment: CNC technology processing, standard specifications, so that the overall workmanship is delicate and shiny. Anodizing provides light, heat and abrasion resistance, as well as higher hardness. Durable: Easily tighten or remove valve cores on bicycles, cars, and any other air filled tires. Apply 120psi of air pressure to the test tank. Not only did it pass the test, there was no air leak. Suitable for tubeless tires, easy to install and remove, a great tool for cycling enthusiasts. Superior Seal: With a removable valve cover, O-ring and lock nut. Universal round rubber base with O-ring to keep nut tight and protect your rims. The lock nut increases friction, better fix the air nozzle and prevent air leakage.