4 in x 2 in Flush Bushing, Spigot x Hub Fitting Connection Type/ MAXIMUM OPERATING TEMP: 180.0 DEG FAHRENHEIT SINGLE RESPONSE CONNECTION TYPE: UNTHREADED EXTERNAL TUBE 1ST END CONNECTION TYPE: UNTHREADED INTERNAL TUBE 2ND END NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 4.000 INCHES 1ST END NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 2.000 INCHES 2ND END PART NAME ASSIGNED BY CONTROLLING AGENCY: FLUSH BUSHING REDUCER, 4 X 2 MATERIAL: PLASTIC ABS OVERALL