TechPro Premium ShatterProof Crystalline Tempered Glass Screen Protection For Samsung Galaxy S3 - 8-9H Hardness. 0.4mm Thin. Rounded Edges. Keeps your Galaxy S3 screen from shattering on a fall or hard impact. Hard coated scratch proof 8-9H. Rounded edges prevents any chipping Glass so clear you won't notice you have a screen protector. There are no gaps between LCD and the glass screen protector.