Description These presta valves cores are good bike necessities, made of premium material, can be used for a long time. They are taken to replace the leak of the old valves and make the tire rejuvenation, stop air leaks from old valves, compatible and good air tightness, safe and reliable. Features - Color:Assorted. - Material:Copper, plastic.- Size: 2.60X0.50X0.80cm/1.02X0.20X0.31in - These valves cores is made of quality copper, durable, safe and reliable.- These French valves cores are mainly applied in bikes, universal presta valves cores.- Easy to install, use valves removal tool to screw onto presta valves stem.- This is a useful bike accessory that can be used to replace old or broken bike valves cores.- Produced by professional equipment, with good air-tight effect, safe to use.Packing list: 12 x Valves Cores1 x Valves Core Remover Tool