Item Name: Box Underwater Diving Shell Waterproof Case Protection For Insta360 ONE X2. Description:Waterproof ring material: amorphous high-activity silica gelButton material: siliconeProduct Name: for insta360 ONE X2 Waterproof Case Protective ShellColor: transparentShell material: high permeability and corrosion-resistant PC/Germany Bayer 2805Material of connecting shaft between main body and back cover: high hardness 304 stainless steelPacking list:Waterproof shell*1Base*1Screw *1 Waterproof/