Description: Fits handlebars 16mm to 38mm in DIAMETER. Mounting Ball size 1" This motorcycle handlebar mount holder clamp contains a 1" rubber ball The adjustable arm allows users to adjust the bracket at any angle and the adjustable gripper further secures the arm to any position The adjustable screw top allows this to rotate 360 degrees and can be easily strengthened to prevent unwanted movement In the jaws of the Mounting Handlebar are rubber grips, which provide a sturdy and non-slip grip Specification: Mounting Type: Handlebar Material: Powder Coated Marine Grade Aluminium Ball Size: 1" (25mm)Rubber Ball Handlebar Mount Holder Clamp: Accommodates rails from 3/5"(16mm) to 1-1/2" (38mm) in diameter Package Includes: 1 Set Motorcycle Bike Handlebar Mount(2 Pack) Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5- difference due to manual measurement.( =2.54cm) 3. Instruction is not included. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you.