Galvanized Malleable Iron Reducer Coupling, 4" x 3" Pipe Size, FNPT Connection Type/ CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS SPECIAL FEATURES: 4X3 INCHES,MATERIAL:GALVANIZED MALLEABLE IRON,PSI:300 AT 150 DEG F,STANDARDS: CLASS 150.ANSI B1.20.1 SPECIFICATIONS MATERIAL: IRON OVERALL THREAD SERIES DESIGNATOR: NPT ALL ENDS