Made of rubber material, and practical to use. You receive several 10 pieces of gas can spout gaskets in the package, which are sufficient to satisfy your daily application and replacement. The spout gasket sealing rings are compatible with most gas can spouts, you do not need to change the type of gasket sealing rings when using different gas can spouts, providing convenience when applying them. The replacement gas gaskets are convenient to store or carry in a plastic storage box, toolbox, backpack, pocket and so on, and they not occupy too much space in your cabinet when they are not in use.It's a good replacement For your bad one. Inner Diameter:.3cm/1.2in Thickness:.0.5cm/0.2in Net Weight:25g Colour:Black Material:rubber Package Contents: 10 x Gas Can Gasket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.