... Brass finish, nickel finish, chrome finish4, Working temperature -20oC to 110oC5, Working medium Water, gas, non-corrosive liquid6, Handle Steel ... handle7, Thread ISO228 ( equivalent to DIN259 and BS2779) or NPT8, Certificate CE, ISO9001:20009, Guaranty ... valves must be hexagonal or octagonal in shape to allow a safe tool grip during the fastening of the valves. ...