Check the listing for details. OS 108 FSR Bearing set. Condition: New. Listed at 4.97 USD. Picture is for bearing type only Picture is for engine type only OS 108 FSR Bearing set Front Bearing: 6000ZZ 10 X 26 X 8 Bearing (Clearance) Rear Bearing: 6904 20 X 37 X 9 Bearing RCBearings OS two stroke rc engine bearings offer dependable, long lasting smoothness. These have as good or better performance than what came standard in your engine at a fraction of the cost of OEM bearings! NOTE: These rc bearings are not appropriate for Heli engines. All heli engines .40ci and above should use a rear bearing with a high speed plastic retainer! Beware of other sellers that try to pass off cheap standard bearings with metallic retainers for your expensive heli engine! Support Email if you dont know which bearings you need or if you are looking for a kit we dont already have.