Thule 1500056107 Short Adapter Sleeve (DoubleTrack, Vertex, Hitching Post Pro)

Replacement 1500056107 short adapter sleeve for the Thule Vertex, Hitching Post Pro, and DoubleTrack hitch-mounted bike racks. Includes (1) adapter. 

Item (B) from the included Thule Vertex 4 parts schematic

Part #: 1500056107
Old Part # (for reference): 8537489 or 853-7489