[Material] Chromed brass. Specifications: MEX39 [Durability] The chrome-plated brass surface makes it durable and waterproof and prolongs the life of tire valves. [Convenient] No pressure loss, even if the valve core is damaged or dirty. Tire pressure can be checked easily without losing the valve cover. [Easy installation] Just tighten the axle of the current tire, no additional dust cover is required. [Scope] Tire valve extension adapter can be used for automobiles, motorcycles, trucks and off-road vehicles. Description: -The chrome-plated brass surface makes it durable and waterproof. - Extend the life of tire valve screws -No loss of pressure even if the coil is damaged or dirty. -Easy to check tire pressure without losing the valve cover. -Easy Installation-Just tighten the current tire shaft, no additional dust cover required. Scope of delivery: Package includes: 6 tire valve extension adapters Specifications: MEX39, 39mm total length Color: Brass Security: Regular tire pressure inspection is absolutely necessary - it can extend tire life, reduce fuel consumption, and improve driving safety.