BOB redesigned car seat adapters provide the parents with flexibility and long-term usability.Compatible with BOB single strollers featuring the Accessory Adapter; NOT compatible with stroller models older than 2011The BOB Infant Car Seat Adapter allows easy installation of compatible infant car seatsThe Snack Tray easily inserts into BOB single strollers featuring the accessory adapter and folds with the strollerCar seat adaptor snack trays designed for use with adaptor once child outgrows need for use of carseat