High quality main motor bearing, left and right-hand crankshaft bearings, including drive sprocket O-ring, both crankshaft bearing O-rings and both outer 2mm thick circlips. All suitable for the Bosch Performance Line and Performance Line CX ebike motor. 

If you have motor noise or play in the crank arms it's usually the main motor bearing and crank bearings. The crankshaft bearings have an inside diameter that does not match a standard bearing (note the inner race wall thickness). These bearings are made to the exact dimensions of the original Bosch bearings. If your motor is out of warranty or you don't have time to wait while it's sent away for repair, this may just save you having to buy a new one.