Link Dream 0.2mm Tempered Glass Film with Full Cover Metal Edge For Apple Watch 42mm (Black) High hardness: surface hardness up to 8-9H, high impact resistance, easy to scratch High transmittance: (98% or more of transmittance) of light transmission rate level, low reflection, high transparency. High sensitivity: there is a strong silicon adhesive on the glass , which makes installation easy and attaches the film firmly so as not to affect the back of the touch screen sensitivity. Automatic bonding,: High quality anti static adsorption film ,make the product bonding and separation simple,easy to operate. it will automatically bond the screen Metal edge full coverage, more perfect protection for Watch