The Pressure Gauge , 0 to 560 PSI, Back Entry is compatible with GEM ELRD 4000, 3GX 1000, 3GX 2000, 3GX 750, 3GX 3000, 3GX 1250, 3GX 4000 models. Always cross-check your machine's model number, or contact our support team to confirm fitment. GEM Equipments Pvt. Ltd. is an ISO 9001:2015 certified, India-based manufacturer (since 1984) of compressed air dryers, cooling towers, industrial chillers, and compressed air treatment accessories, headquartered in Coimbatore, Tamil Nadu. All spare parts on Gemspares.in are genuine and sourced directly from the manufacturer.