Toro 5.50 Inch OEM Roller Assembly. This roller has a 5.00 inch diameter. This assembly comes with a roller, bearing spacers & stainless steal bearing. This is a small little roller wheel used to protect your equipment from hitting the ground. 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.