Dive Case For Insta360 X4 Waterproof Case Housing Underwater 40m Protector Invisible 360° Fully Diving Shell Accessories Material: PC 1: The lens material is PMMA, the transmittance is 95%, and the transmittance after plating AR anti-reflection film can reach 98%. AS waterproof anti-fingerprint film, AS plus hard film, the surface hardness is 5H, which can be compared with ordinary glass hardness, anti-scratch scratching, The coating of anti-fogging film and anti-hanging water drop film is added to ensure the maximum light transmittance during shooting To achieve the clarity equivalent to shooting without a shell. 2: The shell is made of hardened PC, with 10 fine lines inside and outside, making the product scratch-resistant, textured, anti-flower and anti-fingerprint 3: The use of liquid silicone technology, enhance the waterproof function Key material: stainless steel Waterproof ring material: amorphous high active silica gel Product weight: 132g