Item Name: Camera Accessories Waterproof Case Shell Protection Diving For Insta360 ONE X2. Waterproof ring material: amorphous high-activity silica gelMaterial of connecting shaft between main body and back cover: high hardness 304 stainless steelProduct Name: for insta360 ONE X2 Waterproof Case Protective ShellColor: transparentButton material: siliconeShell material: high permeability and corrosion-resistant PC/Germany Bayer 2805Packing list:Waterproof shell*1Base*1Screw *1 Waterproof/