Model "521" Globe-Style,Total Tfe Control Valve Sales Kit B for Product Code: ST1-BH07-0A021000G; 1/2" Size, 304 SST Shell, Tfe Straight Body; 150 # Rf Flanges, Tfe Bellows & Packing, Integral Seat, Tfe Plug,;316l SST Stem (Non-Wetted); .40 Cv Reduced Trim - .250" Orifice; Equal % Inherent Characteristic