Two ways anti-peeper (28 degree left and right sides)

Thickness:0.33mm                        

Hardness:9H                                  

Tempered time:4H                      

Toughness testing: can be folded at 90°or be "U" shape.                    

Ball dropping testing:64g steel ball,dropped from 100CM to the center 3 times,do not broken          

Water drop testing:   ≥115 °, after rubbed by 1*10000# 1KG 5000 times, still keep above 100 °