Stainless steel reducing coupling-press fitting 1, spec: 3/8-4inch 2, standard: DIN, JIS 3, ... as request, pipe wall thickness: 1.0--2.0mm 3. fitting standard: DVGW W534-1995( the standard is same with Mapress ... in inert gases before packingIf you have any question, pls contact with me whenever and wherever. You can send me email ... . We are tested by TUV. Stainless steel reducing coupling-press fitting