Amazon.com : Twin Stroller Connector for Baby Universal Fits Umbrella Strollers Babyzen YOYO Yoya Etc.. Turns Two Single Strollers into a Double Stroller : Baby
Babyzen YOYO - Connect Black - Hajdi
BABYZEN YOYO Connect, Black - Turn Your YOYO2 Pushchair into a Double Pushchair - Still Compact & Easy to Manoeuvre : Amazon.co.uk: Stationery & Office Supplies
YOYO Connect: The Ultimate Double Stroller – Mamas & Papas UK