We are selling a set of 5 bogie wheels that fits Toro Dingo TX 420, TX 425 (some), TX 413, TX 525 wide and narrow, TX 427 wide and narrow. Some of the older 425s use a wider model bogie wheel, we are not selling this here. The bogie wheel we are selling here is about 3 and 11/16 inches tall by 1 and 5/8 inches wide (the other bogie wheels were wider). When you buy this listing you get 5 bogie wheels, 5 gaskets, 5 snap rings and 5 caps. (It does not include the bolt that hold it to the track guide)