1. Suitable For Insta360x4 Fully Invisible Diving Shell 360-Degree Fully Invisible Fully Eliminated Waterproof Shell Protective Case 2. Shell Material: Hardened Pc, With No. 10 Fine Lines On The Inside And Outside, Making The Product Scratch-Resistant, Textured, Scratch-Proof And Fingerprint-Proof 3. Lens Material: Pmma, Transmittance Is 95%, Transmittance Can Reach 98% After Coating With Ar Anti-Reflection Coating, As Waterproof And Anti-Fingerprint Film, As Plus Hard Film, Surface Hardness Is 5h, Comparable To The Hardness Of Ordinary Glass. Anti-Scratch, Worry-Free Photography With One Lens In Hand 4. Waterproof Ring Material: Amorphous Highly Active Silica Gel 5. Material Of The Connecting Shaft Between The Main Body And The Back Cover: High Hardness 304 Stainless Steel Description: 1. Waterproof: 50M 2. Applicable Models: for Insta360 X4 Note:The transparent shell only, does not contain the camera. Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:Transparent Material:PC+PMMA+Coating+Silicone+Stainless Steel Package Contents: 1x Fully Invisible Diving Shell 1x 1/4 Invisible Base 1x Screw 24x Anti-Fog Tablets 1x Storage Bag 1x Wrench 2x English Manual 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.