High Hardness: Increasing shock resistance,ensures a long service life.The improved shape makes it easier to carry and does not take up much space. Fitting on Both Sides: The bicycles in a design is suitable for open handlebars and can be installed on both the left and right side.Suitable for 18-22mm handlebar. This bicycles should be installed at the end of the handlebar.you have any questions,please to our. Improve Bicycles : bicycles with designs,and close the lid to protect that lens from bumps when not in use. Rotatable: 360 degrees rotating : the balls design of this bicycles allows you to it 360 degrees until you adjust your desired direction.