Carbon Fiber Chrome Plated Solid Brass Valve Stem Caps Set For Car/Truck/Suv A1 for Mazda 3 Listing is for a complete 4 piece set. Sick proudly displayed on tops of each cap. Total height is 20.5mm , diameter is 11.6mm. Great for cars, trucks, suvs, or anything else that has a valve stem. These are made from SOLID BRASS Prevents cap from seizing on stem, unlike many other caps out there.