Compatible with Maxi-Cosi® Mico Max 30, Mico NXT, Mico AP, Mico Max Plus, Nuna® PIPA™, PIPA lite, PIPA lite lx, PIPA lite r, PIPA rx, PIPA lite rx, PIPA urbn, Cybex Aton, Aton 2, Aton Q, Aton M, Clek Liing. Adapters for maxi cosi, nuna, cybex and besafe car seats. They are brand new in the box - they were never used because we have a different stroller.