Foldable shield with alloy base and two screens, one clear and one amber, designed for airsoft scopes and sights. This great little unit protects the lens window for your scope or sight from impact and scratching in adverse conditions. The unit has a 25mm base with a quick-fitting thumbscrew and comes complete with an Allen key to fit the lenses. It also has a rail mount so that one can be installed in front of a scope to give full protection.