... 2.material:impermeable graphite 3.specification: Dg22-Dg152 Graphite pipe fitting1.Delivery of goods : metric thread ; no special requirements are ... .Standard pipe size :Dg25,Dg36,Dg50,Dg65,Dg75,Dg102,Dg127,Dg152We can manufacture product according to the drawing you provide graphite pipe fitting