Amazon.com : Stroller Connectors for Babyzen YOYO2 YOYO+ Strollers,Turns Two Single Strollers into a Double Stroller : Baby
3pcs Coupler Bush Insert Into The Strollers For Babyzen Yoyo Baby Yoya Stroller Connector Adapter Make Yoyo Into Pram Twins - Stroller Accessories - AliExpress
Car Seat Adapter for YOYO Stroller | BABYZEN™ YOYO
Babyzen YOYO+ Baby Car Seat Adapter | Pottery Barn Kids