The ultimate protection for welding Made from engineering grade nylon 66 & featuring an autodarkening lens Designed also for use with standard 90mm x 110mm fixed shade filter User adjustment multishade 913 auto darkening lens Switching time from light to dark 005milliseconds Lockuplookdown lift mechanism Swinging wheel ratchet for comfort & security Auto Darkening Lens Conforms to EN1751997 B9 Unique 5 point wearing angle adjustment as opposed to the standard 3 points Integral harness with swinging wheel ratchet for comfort & security