This is a Boca 14.5x26x6mm chrome steel rear engine bearing, and is intended for use with Novarossi Plus 21-5 and Plus 21-7 off-road competition buggy engines.
This bearing also fits recent Novarossi and RB Concepts engines that
require the special 14.5x26 mm rear bearings. The bearing dimensions
are 14.5mm inner, 26mm outer and 6mm thick. This bearing is open to
allow oil to lubricate the bearings during use. This bearing will also
fit any other .21 to .28 competition engine that uses the same bearing
NOTE: This bearing should be installed so that the balls face
the rear of the engine (towards the backplate), in order to allow