Meter-Tek Brand 4503 series - 4-1/2inch Liquid Filled Process Gauges The 4-1/2" Process Gauges are furnihed in a solid front turret style case, moulded in hi-impact polypropylene, which is ideally suited for corrosive and difficult environments. The solid front gauge is equipped with a solid wall separating the indicating dial from the bourdon tube and a blow-out back which will release from the case if the bourdon tube should rupture. With 316 stainless steel internals, liquid-filled or dry construction, this gauge is ideally suited for the food processing, refrigeration, storage tanks, require-ments of the process, power and chemical industries. This high quality gauge offers the benefit of field filling without any additional kits or accessories. This series process gauges are supplied in 16 different vacuum, compound and pressure ranging from 30"Hg vacuum through 10000psi. FOR 4502 SERIES WITH BRASS MATERIAL INTERNALS & PARTS(TUBE , MOVEMENT & CONNECTOR-chrome-painted ).