Aluminum Handlebar Base Mount with 17mm Ball Head Adapter for Round Rail Diameter 0.5"/0.67"/0.87"/1"/1.26", Compatible with RAM Mounts 17mm/0.67" Socket Arms
Wide Compatibility: This 0.67'' ball handlebar clamp mount base accommodates handlebars 0.5 inch (12mm) / 0.67 inch (17mm) / 0.87 inch (22mm) / 1 inch (25.4mm) / 1.125 inch (28.6mm) / 1.26 inch (32mm) in diameter
Usage of This Ball Mount: This0.671 inch/17mm ball mount is designed to support bike&motorcycle phone holder, mounting to motorcycle and bike handlebars and rear-view mirror as well as other round rails
Package Included: The package comes with four rubber ring inserts to provide a snug fit and protection of the mounting surface. Rubber rings diameter are: 0.5''(12mm) /0.67"(17mm)/ 0.87''(22mm) / 1''(25.4mm)