Model "521" SALES B KIT FOR PRODUCT CODE: ST1-BK07-0A021000G; Globe-Style,Total Tfe Control Valve; 1/2" Size, 304 SST Shell, Tfe Straight Body; 150 # Rf Flanges, Tfe Bellows & Packing, Integral Seat, Tfe Plug,;316l SST Stem (Non-Wetted); 1.0 Cv Reduced Trim - .438" Orifice; Equal % Inherent Characteristic; Model C27 Actuator, Reverse Action, Ato-Fc, 3-17 PSIG Bench Set; I/P Intrinsically Safe Positioner Model D20 I