With these Uppababy Vista upper adaptors you can add a second carrycot to the chassis of your pushchair or raise your Rumble Seat to make your pushchair suitable for twins or children of different ages. The Upper Adaptor also creates more space between your primary and secondary seats. Quick and easy to use with colour coded dot indicators to ensure correct fitting, there are no tools needed and the pushchair folds with the adaptors attached. Please note: These adaptors are required for the following configurations: carrycot and toddler seat, 2 carrycots. Compatible with all Vista models from 2015 onwards.