iKNOWTECH FRONT BACK Clear Full Body Tempered Glass Screen Protector For Sony Xperia M4 Aqua *99% high transparency. Reduction natural viewing experience. 0.3mm thickness. 2.5D Rounded Edges, Anti-oil. Very smoothly and reduction natural hand feel! *9H hardness, Electrostatic adsorption and Anti scratch. It wont be scratch even, If you use a pocket knife to scratch it. And very easy to install. Tempered Glass Anti-scratch ,0.33mm,2.5D Rounded Edges,Reduce Fingerprint,Hardness: 9H Dry Application: Easy to install and remove (Bubble-Free / No Residue) 1 year free replacement!