1, Products: WN, SO , BL , TH, LJ , SW 2, Painted: black, varnish, antirust oil ... , 300, 600, 900, 1500II JIS 5K, 10K, 16K, 20K (PL, SO, BL) III DIN2573, 2572, 2631, 2576, 2632, 2633, 2543, 2634 ... ,2545(PL,SO,WN,BL,TH) IV HG20592-97(HG20593-97-HG20614-97 ... -88) IX JB1157-82-JB1160-82, JB4700-2000-JB4707-2000 flange