Jazer Ultra Thin 0.2mm 9H Hardness HD Clear Ballistic Tempered Glass Screen Protector Film For Apple Watch Sport Edition Anti-Scratch, Anti-Glare, Oleophobic Easy to Install (42mm) Specifically designed for Apple Watch 38mm and 42mm High Hardness: Glass material after high tempered steel processing,surface hardness up to 8-9 h,impact resistance is strong,not easy scratches. Ultra-high light transmittance: (transmittance of 98% or more) optical transmittance grade, ultra-low reflection, high Transparency. High sensitivity: The glass is coated on the back with a strong silicon adhesive that makes installation easy and attaches the film firmly so as to not affect the touch screen's sensitivity. Automatic bonding: High quality antistatic adsorption film ,make the product bonding and separation simple,easy to operate. it will automatically bond the screen.