The 9001SK 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 SK operators have a plastic operator that mounts in a 1.18 inch round hole. This standard pilot light has a plastic ring nut. This pilot light has a 110/120 VAC/VDC full voltage light module to provide the illumination. The light module has an incandescent lamp. This operator is supplied with a red plastic fresnel pilot light lens. When properly installed this opertor is UL listed for Types 1, 2, 3, 3R, 4, 4X, 6, 12 and 13 environments. This operator is UL Listed and CSA certified. "It is installed into a 30mm panel cutout." "The modular range of 30mm plastic control and signaling provides robust and reliable solutions for a wide range of heavy industry applications."