The Bugaboo Donkey 3 base includes all essential hardware parts to assemble your stroller. For your convenience, the wheels caps and handlebar grips are pre-assembled.Suitable from birth—the carrycot bottom and stiffeners are included. Versatile, the seat frame is the basic structure to hold the carrycot and/or seat fabric. As your child grows or when a new baby is on the way, you can change the configuration, (from newborn to toddler, or single to double pushchair) by switching to seat fabric or attaching the additional seat frame.Underseat basket, seat and carrycot fabrics are not included but can be purchased separately. You can combine the Bugaboo Donkey 3 base with the Bugaboo Donkey 3 style set and the Bugaboo sun canopy to build a complete Bugaboo Donkey 3 Monopushchair.Key features:Easy and quick pushchair assemblyConvenience for you—comes with pre-assembled grips and wheel capsVersatile—one single-frame so that you can easily switch configurations