Bearing 4mmx 9mm x 4mm, 2 per package This can be used as a replacement part for the TFL P1 Outdrive. See the red-lined arrow in picture 2 for the part this replaces. Specs: 4mm ID (inner diameter) x 9mm OD(outside diameter) x 4mm width Includes: 2 Bearings per package Note: The diagram is for reference only. This is only one part of the drive.