The adaptors are designed to clip onto 2017 series ABC design prams to allow a Britax UNITY capsule to be used on the pram.
This is highly convenient, allowing you to take the capsule from the car and place it directly onto the pram. Great if bubs is sleeping as there's no need to transfer them.
The following 2017 series ABC design prams are compatible with the adaptor:
Sold as a pair.
Important: These will not fit any other year model other than 2017.