These adapters are designed to fit the Nipper Double Carry Cot onto the Nipper 360  Double pushchair.

These are simple to attach, clicking into where the harness bar would normally attach into,

Two adaptors are also available, if you are using one carrycot and one seat unit then a single adaptor is required, whereas if you require two carry cots for a double pushchair (ie for twins) then you will require this double adaptor.