This bottle swing cap gasket is made of plastic material, which can withstand the 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:Red -Material:Plastic -Size:2.50X2.50X0.70cm/0.98X0.98X0.28in -Note:half cover design - Reliable Material: these bottle lids gaskets are made of plastic material, sturdy enough to serve you for a longtime. - These bottles gaskets are not easy to break, tear or deform, which can perfectly match with your glass bottles. - Safe to use: these seal gaskets are made of plastic, leakage-proof and sealing, sturdy enough for a longtime use. - Multiple purposes: the bottle gaskets can be applied to different kinds of swing top bottles, different beverage bottles. - Nice sealing effect: the washer is convenient to use and can provide ideal performance for sealing. Package list: 10 �� swing top bottle washers