Spotter protective filter for the Hensoldt Spotter 45 and 60 is used in concert with the S.L.I.C.K.-H, (P/N 600-20). Provides rugged protection for the objective lens as well as allowing reduced light transmission and reducing glare via the variable aperture “Catseye” feature. Cover indexes out of the way for full light transmission. Made from 6061 Aluminum, Type lll Milspec Hard coat anodized. 3.1 oz.