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 non-illuminated push pull mushroom operator has a plasric ring nut. This operator has two normally closed and one normally open contacts Contact blocks have a UL Type A600, UL Type Q600 and a 10A resistive VAC ratings. The contacts in these contact blocks are double break. Contact blocks will accept up to two 12AWG to 24 AWG solid or stranded wires. The contact block terminals are protected to meeting VDE 0106 Part 100. 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."