Twin Stroller Connector for Baby Universal Fits Umbrella Strollers Babyzen YOYO Yoya Etc.. Turns Two Single Strollers into a Double Stroller : Baby - Amazon.com
Visland 1PCS Baby Stroller Connector High Hardness Rust-proof Steel Fits Umbrella Strollers Pushchair Connector,Turns Two Single Strollers into a Double Stroller - Walmart.com
Dream On Me Coast Rider Stroller Connector : Target