We have adapters for both Petalo and Knight Strollers. However, an adapter for a Petalo stroller only fits PERO Nido infant carrrier seats, and an adapter for a Knight stroller also fits the PERO Nido, Maxi-Cosi, Cybex, and Kiddy infant carrier seats. You can ask your infant carrier seats supplier or send us an email of your brand and model of infant carrier seat and pictures of its connectors on service(at)kidspero.com