The Trerice D80 Series Industrial Gauge is designed for rugged performance requirements at an economical cost. This liquid filled gauge is furnished with a stainless steel case and crimped ring. Wetted parts are either bronze tube with Lead-Free (PBF) brass socket or stainless steel. Click Here to Download Manufacturer Specifications PART NUMBER Trerice Pressure Gauge PG2.5SS30 2 1/2" face Liquid filled, Bottom mount 1/4" npt SS 60 psi PG2.5SS60 2 1/2" face Liquid filled, Bottom mount 1/4" npt SS 30 psi Compund Pressure Gauage PGC2.5SS30 2 1/2" face Liquid filled, Bottom mount 1/4" npt SS 30" Hg to 30 psi PGC2.5SS60 2 1/2" face Liquid filled, Bottom mount 1/4" npt SS 60" Hg to 60 psi PRESSURE GAUGE, 1/4" NPT. THIS IS STANDARD PRESSURE GAUGE WITH A MOVABLE RING MOUNTED ON THE FRONT. THE RING HAS AN INDICATOR MARK FOR THE START PRESSURE AND THE CLEAN FILTER PRESSURE. WHEN THE FILTER IS CLEAN THE START PRESSURE INDICATOR IS LINED UP WITH THE ACTUAL START PRESSURE. WHEN THE PRESSURE RISES TO THE CLEAN FILTER MARK, IT'S TIME TO CLEAN THE FILTER. THE PRESSURE GOES FROM 0 TO 60 PSI MATERIAL: PLASTIC 190058-G Pressure Gauge Bottom Mount 190059-G Pressure Gauge Back Mount 2" Dial, 0/60 psi Range, 1/4" Male NPT Connection Size, Bottom Mount Dry Pressure Gauge with a Black Steel Case, Brass Internals, Chrome Bezel, and Plastic Lens W30B3000 Pressure Gauge 0-60 psi bottom mount