Out n About Nipper Double Carrycot Adaptors Adaptor 1: For attaching 1 carrycot The Nipper Double Carrycot Adapter 1 is compatible with the Nipper Double V2, V3 & V4 models. You can also use the Adapter 1 to attach a carrycot to your Little Nipper Double. Adapter 1 will be required when attaching 1 carrycot to your Nipper Double / Little Nipper Double. Adaptor 2: For attaching 2 carrycots The Nipper Double Carrycot Adapter 2 is compatible with the Nipper Double V2, V3 & V4 models. You can also use Adapter 2 to attach carrycots to your Little Nipper Double. Adapter 2 will be required when attaching 2 carrycots to the Nipper Double / Little Nipper Double.