Description Auto Darkening welding filter is the spare part of welding helmet to protect your eyes and face from sparks, spatter, and harmful radiation under normal welding conditions. Auto-darkening Filter automatically changes from a clear state to a dark state when an arc is struck, and it returns to the clear state when welding stops. Features ♦ Professional welding filter ♦ Optical class : 1/1/1/2 ♦ Stepless adjustment ♦ With standards of CE,ANSI,CSA,AS/NZS Products details About this item 1,It's a replacement cartridge part for 110*90 filter helmet. 2,External shade adjustment and Internal other adjustable knob. 3,TrueColor Technology to offer you clear view sight. 4,CE EN379 approval 5,Long lifetime with solar panel and replaceable CR2032 battery. 6,High performance with Economical price.