Pressure Gauge,tire pressure gauge,pressusre meter 1.Case material: stainless steel 2.Connection: 1/2, 1/4, 1/8 , ... tire pressure gauge,pressusre meter,gaugeKey Specifications/Special Features:Case material: stainless steel Bourdon tube: copper alloy/SS304 Connection material: ... brass/stainless steel Movement: brass/SS304 Case diameter: 11/2, 2, 21/2, 3, ...