5 1/4" Ø, 3 3/4" Length, 5/16" Shaft - Blower Wheel 5 5/16" Ø, 3 3/4" Length, 5/16" Shaft - Blower Wheel 5 5/16" Ø, 3 1/4" Length, 5/16" Shaft - Blower Wheel 5 5/16" Ø, 3 3/4" Length, 5/16" Shaft - Blower Wheel 5 1/2" Ø, 3 1/8" Length, 5/16" Shaft - Blower Wheel 5 3/4" Ø, 4 1/8" Length, 5/16" Shaft - Blower Wheel 5 1/2" Ø, 4 2/3" Length, 5/16" Shaft - Blower Wheel 5 1/2" Diameter, 5/16" Shaft, CW - Blower Wheel 5 1/2" Ø, 5 5/8" Length, 5/16" Shaft - Blower Wheel