1/4 Diameter x 1 13/16 Length Shaft. Top of the Line Needle Point Ball Bearing Motor - Exceeds all OEM & aftermarket standards. Over 25 years of trusted value and commitment to our customers.Note: You will need to remove the old combustion fan paddle and place on the new motor once installed into the old housing. Using heat and/or lubricant is recommended in removing the old combustion fan paddle blade. The item "Kozi Stove Combustion Exhaust Motor 100XL, KSH120, Baywin Previa AMP-UNIVCOMBKIT" is in sale since Friday, March 6, 2015. This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Fireplaces & Stoves\Replacement Parts". The seller is "esesstoves" and is located in Dale, Wisconsin. This item can be shipped worldwide.