OS&Y Construction, Bolted Bonnet Full Port Or Reduced Bore. Size: 2 – 48"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.