Product name: invisible bell bikeApplicable models: bicycles/road vehicles/balance compounds/pediatric bicycles/small wheels, in Qatar's handleProduct material: aluminum alloys and industrial plasticProduct color: black/blue/red/green/golden/silverProduct features: built -in, elegant, pure, with high and easy to install.Note: The pure manual measurement may lead to errors, please refer to the actual productwindow.adminAccountId=2671824119;..