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This is a replacement O.S. Engines Rear Ball Bearing, and is intended for use with the O.S. 91HZ-PS Helicopter Engine.
Inside Diameter: 17mm
Outside Diameter: 35mm
NOTE: This part may be compatible with other O.S. engines. Please check your owner's manual and cross reference the part number to verify that this is the correct part for your engine.
This product was added to our catalog on June 17, 2009