Shell material: Hardened PC, reinforced with fine lines of 10 on the inside and outside, making the product scratch , textured, anti flower and anti fingerprint. Lens material: PMMA, with a light transmittance of 95%. After being coated with AR anti reflective film, the light transmittance can reach 98%. It is made of AS waterproof and anti fingerprint film, and AS with a hard film. The hardness is 5H, which can match the hardness of ordinary glass and is scratch , achieving worry free photography with just one mirror in hand. Waterproof ring material: amorphous high activity silicone Material of the connecting shaft between the main body and the back cover: High hardness 304 stainless steel<br><br>Name:For X4 Fully Submarine Shell Waterproof: 50M Product weight:148g Colour:Transparent Material:PC Size:155x80x85mm<br><br>Package Contents: 1 * Actiion Camera Diving Case<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.