IMPA 653131/653132/653133/653134/653135/653136 Marine Industrial Pressure Gauge Glycerine Filled EN837-1 Case: Stainless steel case Window: plexiglass / glass Movement and thread: brass Bourdon Tube: brass Dial and pointer: aluminum Liquid filled: glycerine oil / silicone oil Dial: 1.5"(40mm) / 2"(50mm) / 2.5"(63mm)/ 3"(75mm) / 4"(100mm) Accuracy:2.5% / 1.6% / 1% Range: 0+1, 0+4,0+6, 0+25,0+100, -1+0 Bar & Psi, or Customized Connection:BM (bottom connection) BMR(bottom connection with rear flange) BK(central back connection) LBK(Low back connection) CBKF(central back connection with front flange) LBKF(Low back connection with front flange) BKU(central back connection with U-clamp) Thread: 1/8"BSP,1/4"BSP,1/2"BSP or other Operating temperature :Ambient: -40+60℃ Media:±60℃