Silicone material. Soft, reusable, tightly sealed, easy to disassemble during use, no damage to the machine. Precise complete packaging. And it is wrapped in all directions, making it difficult for a drop of air to enter. Non-marking double-sided tape. It adopts non-marking double-sided tape and sticks to the back of the phone. Note: It is recommended to use it with a mobile phone case. Specification: Material: Environmentally friendly silicone, Size: About 23*12.7*0.4mm, Color: Black, White, Interface: Apple, Type-C, Package Include: 2/4/6* Dust Plugs