High grade tempered glass anti scratch & waterproof, Easy to install with screwdriver Well fited to Gopro hero 4 session frame, Tight enough keeps steady Material: Alu alloy + Tempered Glass, Weight?40g, Compatible with Gopro Package Includes: 1×Camera Lens Cover, 1×O-ring, 1×Screwdriver, 8×Screws Camera Lens Glass Cover Replacement Kit Set For GOPRO 45Session GO186 Deal protector for the camera lens of Hero 4 Session Compatible With: For Gopro Hero 4 Session SKU OT776EL11TPLSNAFAMZ-28052 Model GO186