Structure: Floating Ball Type, 2-Piecs Body, Full or Reduced Bore Blowout Proof Stem, Anti-Static, Fire-Safe, Locking Device, Soft or Metal Seated, Flange or Butt Welded Ends, Wrench Operated Designed By: API 608, BS 5351, API 6D, DIN Material in ASTM: A216-WCB, A351-CF8, A351-CF8M, A351-C3, A351-CF3M Class& Size: Class 150~ ~ Class 600, 1/ 2" ~ ~ 8"