The Bumbleride Indie Twin car seat adapter set includes two adapter bars so you can mount two infant car seats on the 2016 through current Indie Twin double stroller at the same time. It accepts Clek, Maxi Cosi, Cybex, and Nuna infant car seats, including the Clek Liing series, Nuna Pipa and Pipa Lite series, Maxi Cosi Mico series, and Cybex Aton series (tested with models manufactured from 2016 and later). It is not compatible with 2015 or prior Indie Twin frames due to a redesign, and seat fabric removal is not required. Choose the single adapter version for one car seat plus the toddler seat.