Features Available in both OS&Y, Bolted bonnet and NRS (Non-rising Stem) constructions Standard Material available in: Body/Bonnet: Cast Iron and Ductile Iron Stem: Stainless Steel Seat: Cast Iron, Ductile Iron, Brass, Stainless Steel Disc: Ductile iron covered with NBR/EPDM Handwheel: Cast Iron or Ductile iron Size ranges available from 2" through 12" Pressure Rating in ANSI 125 & ANSI 150 Operation: Handwheel, Cap Top, Gear Operator, Penumatic & Hydraulic Technical Data Design & manufacture: ANSI B16.10, MSS SP-71 Face to face dimension: ANSI B16.10, MSS SP-71 Flanged dimension: ANSI B16.1/16.5 Inspect and test: ISO 5208/API598 . Depend on the detailed information you reauested.