TechPro Premium ShatterProof Crystalline Tempered Glass Screen Protection For Apple iPod Touch 4th Gen - 8-9H Hardness. 0.3mm Thin. Rounded Edges. Glass so clear you won't notice you have a screen protector. There are no gaps between LCD and the glass screen protector. Rounded edges prevents any chipping At 0.3mm slimness it does not any add bulk to your phone. Hard coated scratch proof 8-9H. Easy to attach