Purchased the stroller on OfferUp and the seller included the adapter & other accessories. As first time parents, we were unaware that there are several adapters for the BOB stroller, and this one is not compatible with our car seat. It was lightly used by the previous owners. HIGHLIGHTS: Infant Car Seats Compatible: Chicco, Key Fit, Key Fit 30 and Fit2 Strollers Compatible: BOB Single Strollers with the Accessory Adapter manufactured from 2011 No tools required to install, folds with the stroller Dimensions: 19.8" W x 13.1" H x 3" D Do not run or jog with your BOB stroller when using an infant car seat adapter and infant car seat. The stroller may become unstable resulting in serious injury. Transform your BOB Stroller into the perfect travel system with the BOB Infant Car Seat Adapter. This accessory allows you to easily connect compatible Chicco Infant Car Seats with BOB Single Jogging Strollers. Material: Aluminum Dimensions (Overall): 13.1 inches (H) x 19.8 inches (W) x 3.0 inches (D) Care & Cleaning: Spot or wipe clean Suggested Age: 0-18 Months Weight: 2.1 pounds Compatible With: Chicco Certifications: Meets ASTM Standards