The Apple Green Sport Buggy Inline Double Kit Adaptor Seat from Phil & Teds attaches to your Inline Buggy front or rear to meet the needs of any growing family. Streamlined styling and function match your choice of Inline -- Classic, Sport, Dash or Hammerhead -- so both juniors ride in comfort and step out in style. Triple the use of your Double Kit by converting it from a Double Kit into an infant bouncer and then toddler chair, with the addition of the Phil & Teds LazyTed Adaptor (sold separately). For newborns to 4 years. Double Kit front load: 44 lbs. Double Kit rear load: 33 lbs. With a steel frame.