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 full guard illuminated momentary push button has a plastic ring nut with a clear plastic end. This push button operator is without a light module to provide the illumination. The proper light module must be ordered separately. A colored lens cap must be added to this operator. Contact blocks with the desired contact arrangements must be added to this operator. When properly installed with a lens cap 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. "This product is certified by CE, CSA LR25490 class 3211 03 and UL listed file E42259 CCN NKCR." "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."