Item number TAM4F. UPPAbaby Vista Lower Adaptors The UPPAbaby Vista lower adaptors allows you to add a second carrycot when used in conjunction with the Upper Adaptors making your VISTA suitable for Twins. They can also be fitted to the botom of the chassis alllowing for a carry cot to be fitted in conjunction with the seat unit. Depth: 4 CM Height: 26 CM Width: 15 CM Allows you to add a second carrycot when used in conjunction with the Upper Adaptors making your VISTA suitable for Twins. Can be fitted to the botom of the chassis alllowing for a carry cot to be fitted in conjunction with the seat unit. No tools required