The car seat adaptor is one of the most important accessories you will ever purchase for your stroller. It is designed to fit several popular car seats including, Peg Perego Primo Viaggio, Britex Companion and most Graco and Evenflo models. Compatible with any Mini, Elite and Classic single strollers and works with car seats that hold infants up to 20 lbs. and less than 26" tall. Car seats adaptors are model specific.