Description: 100% brand new Name: Fully Invisible Submarine Shell Material: PC+304 stainless steel Color: Transparent Size: 24 * 12.5 * 9.5cm Suitable model: For Insta360 X4 Waterproof: 50M Color: Transparent Shell material: Hardened PC, with fine lines of 10 on the inside and outside, making the product scratch resistant, textured, and anti flower and anti fingerprint. Lens material: PMMA, with a light transmittance of 95%. After coating with AR anti reflective film, the light transmittance can reach 98%, and AS is waterproof. Anti fingerprint film, AS plus hard film, with a surface hardness of 5H, comparable to the hardness of ordinary glass. Waterproof ring material: amorphous high activity silicone. The material of the connecting shaft between the main body and the back cover is high hardness 304 stainless steel. List: Diving Shell * 1 1/4 base * 1 Screw * 1 Anti fog film * 4 Storage bag * 1