01012009-b Features: -HDPE plastic board rider.-Innovative kiddy board.-Can turn your carriage or stroller into a double and give your toddler an imaginative and fun ride.-Very convenient to be attached on / detached from most of strollers, buggies and prams (10 mm axle, 25.4 mm round and up to 45 mm oval tube).-Easily installed or un-installed. Includes: -Three different sizes of adaptor included and its width and height can be adjusted to match customer's stroller.