FS1B50 obsolete replaced by FS1B65, Incoming pressure : 20Psi FS1B65 70101/01 p.n. 001.0111.003 U21008/01 ST4 B50BM ST 4 B 20 ST 1 B80 ST 1 B65, ; ST 1 B100 MSV 300 "MSV 2"" 220 VAC, MAX.200 MBAR";; MS25 150MBAR (23413) MS25 MOD. 70610F/6B, COD. 0070052200;; MEMBRANE FOR FSDR 1'' LPG-GAS, REGULATOR FSDR 1-1/2”;;