This product is part of the Harmony XB4 range, an offer of Ø 22mm modular metal pushbuttons, switches, and pilot lights." "This socket adaptor is suitable for mounting a 22mm operator in a 30mm opening." "It weighs 0.008kg." "It is sold in sets of 10." "Harmony delivers an innovative and ergonomic design that improves the reliability of panels, machines and processes." "The modular range of Ø 22mm metal control and signaling units combine simplicity of installation, modern standard and flush mounted design."