The valve stem caps come with an adapter that allows you to easily switch between valves. This feature is particularly useful for those who own multiple bikes or frequently switch between different types of tires. The aluminum construction allows durability, making these caps a reliable choice for any cyclist. Features -Color:Black -Material:Aluminum alloy -Size: 1.63X0.70X0.70cm/0.64X0.28X0.28in 2.43X0.90X0.90cm/0.95X0.35X0.35in 1.63X1.00X1.00cm/0.64X0.39X0.39in 1.65X1.00X1.00cm/0.65X0.39X0.39in -Solid: crafted from aluminum alloy, these valve caps are both lightweight and sturdy, allowing they won't easily break -Valve conversion: the included adapter allows for seamless conversion between bicycle valves, accommodating various valve types -Effective debris prevention: designed to keep debris and particles out, these bike wheel air caps help maintain the cleanliness and functionality of your valve -Multipurpose set: with various pieces in one set, you'll have enough valve caps to your bicycles and spares for future use -Modern aesthetic: the minimalist design of these valve caps complements the look of any bike, especially those with bike stem valves Package list: 4 x French air nozzle caps 2 x French to US conversion heads 2 x French air nozzle caps 2 x American air nozzle caps