The words of Presta and Schrader are not our trademark, which are to show the compatibility of our products, our trademark is Frienda. Features: Reliable material: The replacement valve cores are constructed by durable brass material, which has good air tightness and compatibility, slim and lightweight feature ensure you to carry them out easily and conveniently. Their bright color is not easy to fade, and the waterproof and rust resistant features are available for your long-term application. Easy to store: The dimension of these practical valve cores and wrench is appropriate, which are convenient for you to carry in your pocket or a tool box, and are easy to store without occupying too much space in your cabinet when they are not in use. Specifications: Material: Valve core wrench: aluminium alloy Replacement valve core: brass Color: as picture shown Size: Valve core remover tool: approx. 5.5 cm/ 2.17 inch in length Bicycle brass valve core: approx. 2.6 cm/ 1.02 inch in length Quantity: 11 pieces Package Contents: 1 x Valve core wrench 10 x Replacement valve cores Warm notes: Please allow slight size error due to manual measurement. The colors may exist slight difference due to different screen. Please keep away from your small child to prevent the swallowing risk.