This is an adaptor bar for a bob duallie stroller. It has both the car seat clip plus the food tray so its great if you have an infant (in car seat) and a slightly older sibling who can use the snack tray! These things are expensive and we paid over $125 for it new! Here it is new so you can see it / see what units it woks on: https://well.ca/products/bob-2016-duallie-infant-car-seat_123064.html First $50 takes it