1Wide Application: Truck tubeless tyre valve stem can be widely used inVans, trucks, buses and special vehicle vehicles, fits 0.625in valve hole. 2Main Function: The valve stem seals the wheel tire, maintains the air pressure inside the tyre and prevents air from escaping from the tyre. 3Leak Proof: 1?1/8in wheel tyre valve stem has excellent sealing performance to prevent air leakage, bringing you better using experience. 4Copper Construction: Made of premium copper material, high strength and hardness, wearproof, sturdy and durable, has long service life. 5Ideal Replacement Parts: The set includes 20pcs wheel valve stems, high performance, perfect for your rebuild, repair, and maintenance needs.