Hallo, we are in search for steel fittings (street elbow type SLB/ 90° Socket welding elbow), with holes in metric measurements (inner hole dia 30mm , ih dia 25mm and ih dia 16mm). They seem to be general use in inches. Can you tell us whether these exist for the European market (mm)? Does anyone know a company that makes these components, or give us distributor names. Many thanks; Ps: Pictures (fittings welded with different tubes)