Solid, Flexible or Split Wedge DesignPressure SealedBack-seating, Renewable Seat RingFull Port Or Reduced BoreOptional Upset forged T-head Stem Design. Size: 1/2 - 20″NB Material: WCB,LCB, CF8,CF8M, CF3,CF3M, WC6,WC9, C5,C12 or Equivalent, Available also in low temperature steels, low alloy steels, stainless steels, duplex type stainless steels and other exotic materials; Various trim materials available to suit service conditions.