Detailed Product Description Y-200 pressure gaugeCase sizes: 1.5, 2, 2.5, 3.5, 4, 4.5, and 6 inchesCase material: steel and black steel Tube and socket: brassConnection: 1/8, 1/4, 1/2, 3/8-inchType: bottom or backScale range: -1 to -600 barWindows: acrylic, glass, polycarbonate lens are availableAccuracy: 1.0, 1.6, 2.5