Lau Blower Wheel Part Number 01332601, DD10-6A.
Replacement "DD" Preslok Wheels for direct drive blowers are dynamically balanced and forward curved, incorporating the Preslok center disc construction for positive blade retention, providing higher RPM capability and industry proven reliability. Wheels are made of galvanized, cold-rolled steel. Rotation is by viewing hub (bore) end.
Specifications:
Bore Size 1/2"
CW Rotation as viewing bore end. Convex
Outside Diameter 11-1/8", Length 6"
Number of blades 48

Please see all pictures to see how the blades are curved and where the bore is.