Killark GZB3-G24-M - Operators are all aluminum except for certain movable parts which are stainless steel. All other parts such as screws are either stainless steel or plated steel. Threaded body is M22x1.5. Control operators can be grouped into a single assembly thus reducing installation time and cost. Killark GZ SERIES Operators are a component for use in conjunction with a Hazardous Location enclosure to provide control solutions for; START/STOP Motor Functions, LED Pilot Light Indications and more. Utilized in Class 1 Division 1 & 2, Class 1 Zone 1 & 2 areas for indoor and outdoor use. UL Listed and CSA Certified. ATEX/IECEx certified components. See Product Details for certificate numbers.