BABYZEN YOYO Connect, Black - Turn Your YOYO2 Pushchair into a Double Pushchair - Still Compact & Easy to Manoeuvre : Amazon.co.uk: Stationery & Office Supplies
BABYZEN YOYO2 Double Pushchair from 6 months+ for Twins on Black Frame
Babyzen YoYo² Twin Setup with Connectors (Side by Side) - TinyExplorers