The Bugaboo Donkey 3 Duo extension complete includes the essential hardware parts and the seat fabric. This extension set is the accessory that will allow you to transform your Bugaboo Donkey 3 Mono into a pushchair for two children of different ages. You can combine the Duo extension set complete with the complete Bugaboo Donkey 3 Mono to create a complete double pushchair ready for all your family adventures.. Enhance your pushchair with a new set or colour. Easy installation and more convenience for you—beautifully designed, and practical. Trusted Bugaboo quality and comfort. Includes the hardware parts to convert your Bugaboo Donkey 3 Mono into a side by side double pushchair. Combine it with the Bugaboo Donkey 3 Mono pushchair