Rheem blower wheel 12x11x1/2 cw (12 3/4 x 11 1/8) overall DIM technical data » overall diameter DIM. D (in.): 12-3/4 overall WIDTH DIM. W (in.): 11-1/8 nominal size (in.): 12 x 11 no. Of blades: 43 nominal hub bore shaft size DIM. E (in.): 1/2 no. Set screws: 1 outside edge of disc to outside end of hub DIM. A (in.): 1/8 hub length DIM. B (in.): 1-1/8 disc setback - outside edge of disc to end of wheel opposite hub DIM. C (in.): 5-9/16 Keyway (in.): none rotation direction (facing hub): cw disc shape (hub side): concave used on: rgra09z, rgra10z, rgrj09z, rgrj10ez, rgrk09z, rgrk10z, rgsa-09e/09Nz, rgsa-10e/10Nz, rgta09z, rgta10z, rgtj09z, Rgtj10, rgtk09e/n, rgtk10e/n, 90rj09e, 90rj10, 90tj09e, 90tj10, 90ts09, 90ts10e, rgrs-09, rgrs-10, rgts-09, rgts-10.