... Dial: 1.5", 2", 2.5", 3", 3.5", 4", 6" 2.Connection: brass, stainless steel,plastic 3.Dial and ... pointer: aluminum Liquid-filled Pressure Gauge:(1)Diameter: 1-1/2", 2", 2-1/2 ... )Case:304 stainless steel(3)Window: glass, polycarbonate.(4)Bounden tube: 316 stainless steel, brass(5)Connection: ... stainless steel, brass(6)Connection size: 1 / 8" 1/4" 3/8" 1/2"NPT, BSP, BSPT(7)Pressure Range ...