MAIN CHARACTERISTICS range of product HARMONY XB4 product or component type COMPLETE DOUBLE-HEADED PB device short name XB4 bezel material CHROMIUM PLATED METAL fixing collar material ZAMAK mounting diameter 22 MM shape of signaling unit head RECTANGULAR type of operator SPRING RETURN operator profile 1 FLUSH - 1 PROJECTING PBS operators description GREEN I - RED O contacts type and composition 1 NO + 1 NC contact operation SLOW-BREAK connections - terminals screw clamp terminals :