StilGut 2 x Tempered Glass Screen Protector for Apple Watch & Apple Watch Series 2, iWatch 42 mm 2 x Tempered glass for Apple Watch & Apple Watch Series 2 42 mm, only 0.012 in. (0.33 mm) thick: maintains the original touch and transparency The hardness of 9 H means: extremely resistant against scratches. Peaks of sharp objects cannot damage the surface Anti-fingerprint oleophobic surface Comfortable sensitive touch: one side of the protection is composed of resisting silicon adhesive surface and can be immediately attached to your display Very resistant glass: if however the glass brakes, it is not dangerous due to an internal structure which doesn't cause sharp edges