vatac SO flanges, Slip On, ISO/CE/API Approved Size: 1/2"~80" Material: C.S, S.S, Duplex Rating: CL150~CL2500 VATAC SLIP ON FLANGE:Size Ranges: 1"~80"NB Materials Available in: Stainless steel 304, 304L, 316, 316L, carbon steel Standard Compliance: ASME/ANSI B16.9, GB/T12459, GB/T13401, SH3408, SH3409, HG/T21635, HG/T21631, MSS SP-43, DIN 2605, JIS B2313. Slip-on Flange