0.3mm Tempered Glass "Armor" with 9H hardness, 2.5D Round Edge This very high quality screen protector is made for heat treated tempered glass and is designed to protect the screen of your Samsung S Duos . The material is very thin at ONLY 0.3mm, and will not affect the sensitivity of your screen. If broken the glass breaks up into small pieces for safety, exactly the same as car windscreen. It has a Surface Hardness of 9H, 2.5D Round Edge, so even sharp objects like knife and key will not scratch the glass. Package Included: 1 x SRMPL Premium tempered glass screen protector 1 x Cleaning cloth 1 . Any third party selling a Kstyle product who is not a registered wholesale affiliate is subject to copyright law violation legislation, and purchases from these sellers will not be warrantied by Kstyle.