Detailed Product Description Pressure Gauge with Black ABS CaseCase sizes: 1.5", 2", 2.5", 3" and 4" Case material: black ABS case Tube and socket: brass, stainless steel, steel with nickel plated, 316 stainless steel, phosphor bronze and so on Movement: brass, stainless steel Connection: 1/8", 1/4", 3/8",1/2", BSP, NPT or BSPT dependent on model and size, bottom, back, left side connection, ...