MAIN CHARACTERISTICS range of product HARMONY XB4 product or component type HD F NON-ILLUM PUSHBUTTON device short name ZB4 product compatibility 5 MULTI-CHIP bezel material CHROMIUM PLATED METAL mounting diameter 22 MM sale per indivisible quantity 1 shape of signaling unit head ROUND type of operator LATCHING reset KEY RELEASE operator profile BLACK MUSHROOM 40 MM UNMARKED type of keylock SPECIAL KEY key withdrawal position CENTRE COMPLEMETARY CHARACTERISTICS mechanical durability 300000 CYCLES electrical composition code C11 FOR