F.Dorla Brand New 0.18 mm Ultra-thin HD Clear Tempered Glass Screen Protector Premium Crystal Clear Screen Guarder for Iphone 4/4s(0.18mm-4/4s) Tempered Glass Anti-scratch for iphone 4/4s (Hardness: 9H),0.18mm,2.5D Rounded Edgesrp objects like knives and keys will not scratch it Ultra-thin 0.18mm , specially made with scratch resistant material and rounded edges for a more precise fit Tempered glass film provides super smooth touching as well as no lose in touch screen sensitivity. Coming with a screen polishing cloth and an alcohol wipe, helps you wiping away marks and fingerprints during the easy installation, remember not to fold the tempered glass film when installing Perfect Anti-Shatter: if broken, this screen protector cracks into small pieces that are held within the film. They are not sharp, making it safer than other glass products.