1, Fire extinguisher recharge pressure gauge 2, Manufacturer export from 1978. 3, EN3 & ISO certification. Fire extinguisher recharge gauge.We producing and supplying various pressure gauge for all kinds of fire extinguishers.Specification.StructureSpring pipe & Eccentric pipe & diaphragmDiameter23mm, 25mm, 27mm, 30mm, 35mm, 37mm etcThread.M10*1-12.5, 1/8"NPT etcDial.By selection, and by customer ...