LS40P51D11 is a 40 mm wide, standard reinforced Limit Switch made of fiber-glass reinforced UL-V0 material, with 4 mounting holes at the top and bottom, 1 Pg13.5 cable entry on the bottom, adjustable plastic roller lever (Ø22 mm) actuator and 1 N.O + 1 N.C slow action (Zb type), overlapping (late closing) contacts