8 3/8" Hub Dia.

5/8" Stud

Instead of buying 4 separate axle covers, this one saves you money by including the features of 4 models into one:  INT8-4; MK8-2; MR8-2P; MR8D-1. 

Fits THE most common single AND tandem 8-bolt hubs on the road.  Common on International, Freightliner, Mack, KW, Peterbuilt, and Volvo.

Fits all 8-bolt motorcoach Meritor hubs too:  Common on MCI, Prevost, VanHool, Neoplan, Setra.

Note: Many customers confuse the 4-IN-1 with the INT8-3 which is for a larger 13/16" stud.  Be sure the hub you need has the correct stud size.