Toro 21.00 Inch OEM Smooth Roller Assembly. This roller has a 2.50 inch diameter. This Assembly comes with a roller tube, roller shaft, ball bearings, bearing lock nuts, seals, V-rings, roller rebuild kit & grease. This roller is smooth, unlike the Wiehle roller that has groves built in. Toro OEMs are created to keep your equipment up and running with the highest quality parts. To verify that this fits your Toro equipment, please do a model & serial number search.