Stainless steel pipe cutter Stainless steel pipe and press fitting(Various kinds of pipe fittings) Sizes range:The norminal diameters are: DN15, 20, 25, 32, 40, 50, 65, 80 and DN100, including GB 1 and GB 2.GB 1 series is same size as DVGW W534:1995, out diameters are: 18, 22, 28, 35, 42, 54, 76.1, 88.9, 108mm.GB 2 series is same size as JIS G 3448-1997, out diameters are: 15.88, 22.22, 28.58, 34 ...