Kolcraft Infant Car Seat Attachment for Contours Options Tandem Double the pleasure, double the fun! The Infant Car Seat Attachment is great for twins. This attachment fits the Contours Options Tandem Stroller and can be used to hold many different brand name car seats. The following Infant Car Seats can be used: Baby Trend Flex-Loc, Baby Trend Latch-Loc, Britax The Companion, Combi Connection, Cosco Arriva Series, Cosco First Ride DX, Cosco Turn-A-Bout, Evenflo Cozy Carry, Evenflo Discovery, Evenflo Embrace, Evenflo Portabout, Graco Safe Seat, Graco Snug Ride Series, MaxiCosi Micro, Peg Perego Primo Viaggio, Peg Perego Primo Viaggio SIP, Safety 1st® Designer® 22, Safety 1st® Starter.