The BOB Infant Car Seat Adapter allows parents to put their infant car seats into Duallie BOB strollers (one car seat only with Duallie Adapter), providing a great deal of flexibility and convenience when traveling. It also includes two convenient trays for sippy cups, toys, snacks, and more. Semi permanent installation for safety and durability that folds with the stroller. This adapter is compatible with Britax Companion 2003 and newer, Graco Snug Ride 2003 and newer, Peg Perego Primo Viaggio 2003 and newer, Peg Perego Primo Viaggio SIP 2006 and newer, Graco Safe Seat 2006 and newer.The BOB Infant Car Seat Adapter allows parents to put their infant car seats into the Duallie BOB Stroller, providing a great deal of flexibility and convenience when traveling. It also includes two convenient trays for sippy cups, toys, snacks and more. Not compatible with 2011 and newer strollers.