Make strolling with your Element Convertible Stroller and infant car seat a breeze with the convenience of the quick click-in multi-brand car seat adapter. Designed to work with select infant car seats, and if you purchase two adapters, you can attach two seats side by side. The Element Universal Car Seat Adapter fits 25+ different car seats (sold separately). Brand specific car seats adapters available (sold separately) Britax, Chicco, Cybex, Graco, Maxi-Cosi, and Nuna.