Model 6987 SALES B KIT FOR PRODUCT CODE: JA5-5S17-1AXF6662A; Back Pressure Relief Regulator,Non-Asbestos Gaskets Opt-46; 3/4" Size; Wcb Body & Spring Chamber; S1 Trim: 316SST Metal Seat,302SST Diaphragm; Two Npt Connections Std., Remove Plugged Side Inlet Connection For;Third Body Connection (Opt-33); 200-450 PSIG Range Spring; Special Construction