1.Fittings set:long life time and good quality 2.ccc.ISO, ... .Extensive use 5.DIN,SAE standand 3,4,7 pieces fittings(bolt,axis nut,cutting ring,axis sleeve,connector): we specialize ... ,12,14,15,16mm etc fit for the same specs pipes. Connections:male to male,male to female,female to female ...