Normal Size: 1.5"(40mm),2.0"(50mm),2.5"(63mm), 3"(75mm),4"(100mm),6"(150mm). Pressure Range: -40-0-1000mbar Accuracy: 2.5%, 1.6%, 1.0% Case: black painting steel Bezel: black painting steel Connection: Brass Movement: Brass Dial: Aluminum Pointer: Aluminum