This is a front axle tube seal plastic guide for a 1998-2014 Ford F250 and F350 with either the Dana 50 or 60 front axle. These are to be used with the 2019816 axle tube seals. If you are unsure of the guide that you need feel free to email us with your differential tag number and we can tell for sure which one you need. These are slightly smaller than the 53987 that we have available. Shipping is FAST and FREE in the continental U.S.