The 9001K, 9001SK and 9001KX push button lines have 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. Hermetically sealed logic reed contact block are for low energy level circuits. This hermetically sealed logic reed contact blocks will work on 9001K, 9001SK and 9001KX operators. There are some restrictions on how they can be mounted to ensure proper operation. Contact block has one normally closed contact. Contact block has pressure wire connectors. Terminals will accept one or two solid or stranded wire from 18AWG to 14 AWG. Terminals should be tightened to 5 to 8 lb-in. Contact block is UL Listed and CSA certified. "This product is compatible with Harmony 9001K pushbuttons and switches." "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."