Detailed Product Description Dry pressure gaugeCase size: 2.5, 4 and 6 inches Case material: 304SS Bezel material: stainless bayonet and bezel Tube and socket: 316 stainless steel Connection: 3/8, and 1/2-inch NPT, BSP and PT depend on model and size Type: bottom ot backOily type: glycerin or siliconeScale range: -1-0-700kgWindow: PC; Accuracy: 1, 1.6, 2.5