Harmony 5 Control Station - Single-Way Polycarbonate enclosure with an ingress protection of IP65 Flush 22mm diameter double insulated bezel pushbutton with spring return action Body dimensions: 68 x 68 x 53mm Knockouts: 2 x 20mm (side) 2 x 19mm (base) Note Additional contact blocks available, see stock nos. 331-0574 & 331-0580