The 9001K push button line has a large variety of operators and accessories for heavy industry applications. These operators are used in the petrochemical, metallurgy, mining, oil and gas, wastewater treatment and automotive manufacturing industries and more. Type K operators have a die cast operator that mounts in a 1.18 inch round hole. This standard pilot light has a die cast ring nut. This pilot light has a 277 VAC 50/60 Hz transformer light module to provide the illumination. The light module has an incandescent lamp. This operator is supplied with a green plastic fresnel pilot light lens. When properly installed this opertor is UL listed for Types 1, 2, 3, 3R, 4, 6, 12 and 13 environments. This operator is UL Listed and CSA certified. "This product is certified by NEMA and UL 508. It meets EN/IEC 60947-5-4, JIS C 852, EN/IEC 60947-1, CSA C22.2 No 14, EN/IEC 60947-5-1 and JIS C 852 standards." "It is installed into a 30mm panel cutout." "A comprehensive range of illuminated pushbuttons, pilot lights, emergency stop buttons, selector switches, joystick controllers and accessories to fit your needs." "The modular range of 30mm metal control and signaling provides robust and reliable solutions for a wide range of heavy industry applications."