Compatibility: Fits WonderFold W2 Original+, W2 Elite/Luxe, W2 Original (Target Exclusive), W4, W Series Pro (W2 Pro, W4 Pro), and L Series stroller wagons only.

Room for All: Mounts on one side of the wagon, leaving space for a seat on the other.

Car Seat Adapter Capacity by Model:
W4, W Pro, and L Series Stroller Wagons: Fit up to 2 car seat adapters.
W2 Elite/Luxe Models (Non-Pro): Fit 1 car seat adapter for Nuna, Cybex, Maxi-Cosi, Clek, Graco, Chicco, and Britax. Fits up to 2 adapters for UPPAbaby only.