City Bike Mount separate case [RecMount Plus] [R+Bar] "Mount only, required"

Glass fiber nylon material is available in five sizes: 35/31.8/26.0/25.4/22.2mm base Installation position: B. For city bikes, for those who are unsure if their bike is compatible This product is a dedicated product for [REC MOUNT+] device products (dedicated cases or smartphone universal adapters [R+3M] / universal cases [R+Silicon]), and cannot be attached to cases from other companies. Please refer to the manufacturer's product details page for information on installation, dimensions, and other precautions, as they cannot be included due to character limit. Installation tools are not included.