Brand New Bugaboo Donkey2 V2 Silver seat/carrycot frame
Bugaboo Donkey2 seat/carrycot frame
The plastic measurement which attaches to the seat is 108mm long. So please check the age of your frame before buying.
Version 1 is from 2011 and 2014 (93mm long) where the Version 2 was brought out in 2015 (108mm long).
Both the V1 and V2 seat frames will fit any donkey chassis. However there is a visible difference of 15mm between the two different frames. If you don't want to see this difference then you will have to make sure you buy the correct one to match.