Schwinn Universal Bicycle Bike Angled Elbow Trailer Couplers - Set of 2 Fits all Schwinn and InStep brand trailers manufactured after October 25, 2016, series AF (including all series AG, AH, AI) Allows Trailers to be Transferred from One Bike to Another Without Re-installing Couplers This bike trailer coupler offers easy and hassle-free installation for your Instep or Schwinn bicycle trailer to almost any model of bicycl Locking washer included 1-Year Manufacturer's Warranty