1. high quality PP material to make the helmet shell

2. filter information as following:

filter size:110*90*9mm

view size:93*43mm

light shade:DIN4

dark shade:DIN9-13

shade adjust way:external 

switching time:1/15000s

delay time:0.1-1.0s

battery supply:lithium +solar

sensor number:2 pcs

UV/IR protection：DIN16

grinding：yes

LCD quantity: 1 pcs

3. packing:20pcs per carton and colour box at the side of the carton