1/2" NPT Bottom, 4" Dial, 30" Hg VAC to 300 psi/kPa, SS StabiliZR Gauge, Dual Scale PFPStainless Steel StabiliZR Gauge, Dual Scale, 1 2" NPT Bottom, 4" Dial, 30" Hg VAC to 300 psi kPa Dial: White aluminum with black and red markings Case: AISI 304 SS (dry) Lens: Polycarbonate Ring: AISI 304 SS bayonet Socket: 316L SS Bourdon Tube: 316L SS Movement: 304 SS, (under and overload stops 4 and 6) and StabiliZRTM dampened movement (silicone in sealed chamber) Pointer: Aluminum, anodized black, micrometer adjustable Welding: Laser welded socket