Legrand Osmoz 024212: button box with yellow punch cover complete with 1 nf contact. Complete LeGrand Osmoz Button Box. Features of this Grand Case: Red Punch - Push/Turn Diameter: 40 mm. 1 x NF contact Colour: yellow cover. General characteristics of legrand osmoz boxes: button boxes fitted with head and contact block. Connection by IP 66 screw terminals. Complies with iec standard 60947-5-1. Complete housing.