Amazon.com: Stokke Stroller Multi Car Seat Adapter, Black - Compatible with Select Maxi COSI, Nuna, Cybex & Clek Car Seats - for Stokke Trailz Terrain, Xplory 6 & Xplory X Strollers -
Bugaboo Donkey Twin Adapter for Turtle/Maxi Cosi® Car Seats Black | Bugaboo
Cybex, Nuna, BeSafe, Maxi Cosi Adapter für Metro+, ERGObaby | myToys