24" AXIAL UPBLAST BELT DRIVE EXHAUST VENTILATOR (LESS DRIVE PACKAGE), BLADE DIAMETER: 24", NUMBER OF BLADES: 5, PROPELLER MATERIAL: STEEL, MAX. INLET TEMP:120*F, BEARING TYPE: REGREASABLE PILLOW BACK, RPM RANGE:525 TO 925, SPEED CONTROLLABLE: NO, MOUNTING LOCATION:ROOF, HOUSING MATERIAL: GALVANIZED STEEL, REQUIRES ROOF CURB FOR NEW INSTALLATIONS, AGENCY COMPLIANCES: UL/cUL 705 LISTED, BASE HEIGHT: 1 3/4", BASE DIMS: 50 1/2" SQ., OVERALL HEIGHT: 26", OVERALL DIAMETER: 34", SHAFT DIAMETER (BOTH ENDS): 3/4", WEIGHT: 185 LBS, IN BULK, MADE IN USA.