This is a 2017 model. This model is obsolete now so no replacement parts can be bought unfortunately. It is a double stroller with the front forward facing option with a harness for a child to sit and a rear facing option for a child to sit or stand. There is no option for a car seat to be clipped in (that piece is gone and the company no longer makes it). Great storage underneath the seats. Needs a good cleaning! Message me with any questions.