Oyster Max Tandem Seat Adapters is available in Travel Systems

The Oyster Max Tandem seat adaptors are required for attaching the Oyster Max carrycot or infant car seat in the lower position on the Oyster Max chassis. The Tandem seat adaptors are supplied with the Tandem seat, if you are therefore purchasing the seat you will not need to purchase the seat adaptors. Simply attach the Oyster Tandem Adaptors to the chassis and clip the carrycot in place, if you are using the adaptors to fit an infant car seat you will also need the correct infant car seat adaptors to fit in to the tandem adaptors before using the car seat.