... SGS,ISO9002:2008 certification 1.Name: brass refrigeration copper fittings2.Material:Brass 3.Size:16-1/2",20 ... sizes and tolerances: Outside diameter mmWall thickness mmNominal) Min. MaxNominal Min. Max.12 12,0 12.31,1 1 ... 2.8 3.225 25,0 25,32,3 2,3 2,725 25,0 25.33,5 3.5 ... 2,3520 20,0 20,32,25 2,05 2,6525 25,0 25,32,5 2,3 2, ... 32,0 32,33 2,8 3,43. Copper pipes manufactured according to the norm UNE-EN1057 ...