Description: 100% brand new and high quality Features: The product design has a bottom diameter of 8mm/10mm and a ball head diameter of 25mm. It is suitable for most models and brackets and has a wide range of applications. Ball head is made of rubber, and the screw is made of stainless steel, weatherproof, durable, rust-proof, durable and beautiful in appearance. screw adopts thread design and can be directly installed on the original rearview mirror of the car or where there is a screw hole, which is convenient and quick to install. Anti-skid and shock-proof, rough surface particles, increase contact area, not afraid of shaking. Easy and convenient installation, simple to start and easy to use. Specifications: Product Name: Bracket Fixed Ball Head M8/M10 Material: Stainless Steel+Rubber Color: Black+Silver Size: M8/M10(optional) M8: Ball Head Diameter 25mm, Thread Length about 11mm, Pitch 1.25mm, Bottom Diameter 8mm, Total Length 52mm M10: Ball Head Diameter 25mm, Thread Length about 11mm, Pitch 1.25mm, Bottom Diameter 10mm, Total Length 52mm Thread direction: Positive Teeth (right-hand thread) Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1 Piece Motorcycle Ball Clamp Base