These swing cap gaskets are made of plastic material, which can withstand the long-lasting use. Features the plastic material, which has high durability, not easy to deform. Fine workmanship, it the practicality. You can use these cap gaskets with confidence. Features -Color:Assorted Color -Material:Plastic -Size:2.50X2.50X0.70cm/0.98X0.98X0.28in - Easy to Use: this gaskets are easy to apply, and can provide a good sealing for your beer, , soda and other drinks. - Good Air Tightness: our gaskets can be inserted into the top of the , forming a fast airtight sealing, avoid air getting into. - Good replacement: These gaskets replacements are reliable and serviceable, can withstand high pressure to replace your worn. - Reusable plastic: these lids gaskets are made of reliable plastic material, sturdy enough to serve you for time. - : These bottles gaskets are not easy to break, the ideal tool to match with your swing bottles, meet your different need. Package list: 12 bottles gaskets