These are replacement 8x12x3.5mm rubber-shielded bearings for your Clodbuster CVD/XVD axles.  These bearings have a slightly thinner 3.5mm thickness to ensure smooth installation of your axles and are replacements for the stock RC4WD XVD 4mm thick bearings.  You will receive a pair of (2) bearings as pictured.  These bearings are also direct replacements for the bearings used on the Thundertech Racing CVD axles.

Note:  If replacing the stock XVD bearings with these, you need to order 2 pairs PER front or rear gearcase.