The 9001K and 9001SK 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. This replacement green mushroom knob is used on Type K and Type SK push pull operators. It can be used on momentary and maintained push pull operators. The knob has a distinctive silver ring on the front of the knob. The knob is 1.61 inches in diameter. "It is available in green color. The outer diameter of this product is 41mm. It weighs 0.005kg." "It is ideal for petrochemical, metallurgy, mining, oil and gas applications. It is also suitable for automotive, water and wastewater treatment applications." "This product is compatible with Harmony 9001K and 9001SK range pushbuttons." "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."