1 dial diameter:2 2 material of case and color: Black-painted steel 3 ring: Chrome-painted steel 4 window: Acrylic 5 stem: Chrome-painted brass stem with release valve, with rotary angle chuck 6 pressure range:0~60psi,0~100psi or 0~160psi 7 accuracy: + -3~2~3% of span 8 with rubber protector