". Works With Auto-darkening welding helmet, Compatible With Item Number s 21306, Dimensions L x W in. 3 7/8 x 1 3/4, Lens Type Front/inside cover lens, Lens Color Clear, Lenses qty. 6. Designed for use with Wel-Bilt Item# 21306 Auto-Darkening Welding Helmet sold separately Contains 4 front cover lenses and 2 inside cover lenses Not related to WELBILT products of Enodis companies"