Used, very good condition.

Converts Ball Head to Gimbal Head
Easily Reposition Big Telephoto Lenses
Quick and Easy to Attach

Ideal for 300mm, 500mm, etc. Lenses - Check Compatibility Reference Chart below

Only 1.3 lb and compact enough to pack, the Arca Sidekick Ball to Gimbal Head Adapter from Wimberley quickly converts any ballhead with an Arca-style quick release clamp into a gimbal head. This allows the lens to rotate around its center of gravity, dramatically improving handling and vibration dampening. 

A quick-release plate is required when using this adapter. - NOT INCLUDED

Note: In some cases it is necessary to add spacers to the adapter. Please click below for the Sidekick/Lens Reference Chart:

https://www.bhphotovideo.com/FrameWork/charts/wimberleySidekickChart.html