Backrest support

On the standard tricycles (Husky, Mini, Midi, Maxi, Maxi Comfort) is it possible to assemble a backrest support. The backrest support belt is not included and needs to ordered separately.
The backrest support can also be ordered for the tandems (Kivo, Kivo Plus, Twinny, Twinny Plus).
 

Rugsteun fiets van Raam