The Chicco Infant Kit is compatible with the following models: Chicco Keyfit30, Fit2, and Keyfit35.
The Universal Infant Kit is compatible with the following models: Clek Liing, Clek Liingo, Maxi Cosi Mico and Coral XP, Nuna Pipa, Nuna Pipa Lite, Nuna Pipa Lite XL, Nuna Pipa Rx, and Cybex Aton system (aton, aton 2, aton Q, aton m)