Detailed Product Description General Service Pressure Gauge (Manometer) with Black ABS Case Case sizes: 1.5", 2", 2.5", 3" and 4" Case metarial: black ABS case Tube and socket: brass, stainless steel, steel with nickel plated, 316 stainless steel, phosphor bronze and more Movement: brass, stainless steel Connection: 1/8", 1/4", 3/8",1/2", BSP, NPT or BSPT dependent on model and size; bottom, back ...