About the product1. Tempered glass protector is made of chemical processed glass,which has excellent window display ,high sensitivity and comfortable touch teeling . 2. Oleophobic Coating:A.F(Anti-Fingerprint)coated layer for resistance against smudges and fingerprints. 3. Surface hardness:8-9H 4. Slim chemical treatment processed tempered glass. 5. A.S.F:Anti-syattered film(high silicone coating). 6. Advanced silicone adhesion. 7. Sebsitive touch,mirror function.

http://olla.gr/for-galaxy-tab-a-9.7-t550-t555-0.4mm-9h-surface-hardness-2.5d-explosion-proof-tempered-glass-film/