"The gauge mounting valves,which use the following refrigerant fluids: R22 , R134a, R404A, R407C, R410A; R507 proper to the Group II (as defined in Article 9, Section 2.2 of Directive 97/23/EC and referred to in Directive 67/548/EEC). Connections SAE. Flare 1/4""inlet and NPT.1/8"" to gauge, Depth installing 17 mm. ,,Ts= -60 to +130 C ,Ps=45 bar ,that have to a little flange for fixing the valve to the control panel - a SAE-Flare connection for joining it to the copper tube - an NPT (type 8320) or a swivel SAE Flare (8321) connection for mounting the gauge"