The oyster max 2 second seat allows you to convert your oyster max pushchair into a tandem the tandem seat also comes with adaptors to fit your oyster max pushchair and wheel guards there are 25 different combinations for the oyster max 2 when used with the second seat carrycot or a car seat pushchair carrycot and car seats available separately the second seat is suitable from birthupgrade the tandem seat with the addition of the colour pack sold separately featuring a colour co ord