Model "DA4" SALES A KIT FOR PRODUCT CODE:D44-3PF7-F1310000D; Pressure Loaded Reducing Valve (Series IV)-PLPRV; Body Size 1/2",Standard Diaphragm Construction; Bronze Body & Loading Chamber; P Trim: 17-4ph SST Trim With Polyall Seat,Buna-N(Nbr) Diaphragm,; Buna-N(Nbr) Static Seals,Tfe Cap Seal W/Buna Energizer Dynamic Seal,