The Bugaboo Donkey 5 Duo extension set complete gives you the freedom to transform your Bugaboo Donkey 5 Mono into a side by side double stroller. You can combine this box with the Bugaboo Donkey 5 base to create a complete stroller for two children of different ages. Choose from available trendy colors to style it your way. This extension set comes with all the elements to make your Bugaboo Donkey 5 ready for your growing family: seat/pram body frame, carry handle, seat fabric complete, rain cover, sun canopy fabric, sun canopy wires & clamps.