... .4307 and P250GH.Sizefrom 1/2"-84"StandardANSI, DIN, JIS, BS, SH, BS4504, EN1092-1, BS3293 and other standards.typeWN,SO ... : class150 300 400 600 900 1500 and 2500, PN6 10 16 25 40 64 and 160, DIN2572, 2576, 2502, 2631-2635 ... -term and friendly business relationship with you in the future. BS FLANGES