Model "ALR-1" Pressure Reducing Regulator W/Unloader For Remote Loading; Body Size 1-1/2",; Cf3m Body, 316l SST Loading Chamber; 316l SST Trim, Pa Seat, Fk Diaphragm;Fk Static Seal, SST/Tfe U-Cup Dynamic Seal; Extended Nipples End Connection; Lower Spring 2-5 PSIG Range; Internal Sensing, Standard - Flow To Open Direction; With Unloader, 1/4" Size Npt, Bronze Body & Spring Chamber,;S2 Trim, SST Metal Seat And Diaphragm, Spring Range 100 - 175 PSIG; Brass Filter, Brass Fitting; Opt-56: Special Cleaning Per Spec #S-1542