Use the Bugaboo Donkey5 Duo Extension Set to expand your Bugaboo Donkey5 Mono stroller into a duo configuration for two children. Use the set in combination with the Donkey5 Mono stroller and sun canopy (both sold separately). Turn your mono configuration into a complete stroller for two children. Walking together is much more fun! Characteristics extension set extension set for the Bugaboo Donkey5 Mono Stroller (sold separately) set consists of one seat/bassinet frame, seat fabric complete, carry handle, canopy wires, canopy clamp and rain cover excluding sun canopy (sold separately) compatible with the Bugaboo Donkey2, Bugaboo Donkey3 and Bugaboo Donkey5 Bugaboo Donkey5 Duo Extension Set