FIRE EXTINGUISHER MANOMETER >> PAGE   1   2 product description Diameter Working Temperature Accuracy Connection Thread diaphragm type pressure gauge 23,35,40 -30！60＜C 4 Grade M8*1,M10*1,G1/8,NPT1/8" product feature: 1. Brass, nickel plated shell or stainless steel shell. 2. Completely shockproof and waterproof. 3. No material fatigue phenomenon under pressure. 4. The window is made from unbreakable polycarbonate plastic. 5. The indicating data is accurate and distinct for reading.