This is an optional Traxxas TRX-4M Complete Bearing Set.
Reduce friction and increase the precision of your TRX-4M™ by replacing the stock bushings with these high-quality black-seal bearings. Black-seal bearings offer ultimate protection from the elements with less maintenance in dirty environments.
Includes:
(8) 3x6x2.5mm
(4) 5x8x2.5mm
(4) 4x8x3mm
(2) 8x12x3.5mm
(4) 3.5x7x2.5mm