Detailed Product Description pressure gageCase size: 2.5, 4 inchesCase material: 304SSTube and socket: brass and phosphor bronzeConnection: 1/4, 1/2, 3/8 inches, NPT, BSP or BSPTType: bottom or backScale range: -1 to 0 to 600 barsWindows: acrylic, glass, anti-explosion and polycarbonate lens availableAccuracy: 1.0, 1.6 and 2.5