Description: This is a motorcycle mirror frame base with 10mm hole. It helps isolates and dampens shock and vibration. This design of the item allows user to mount to just about many things on your motorcycles. Mounts are made of high quality material with a black coated finish, stainless steel hardware and plastic balls. Most applications require an attachment base, arm, adapter base and an accessory cradle to complete a kit. This base is suitable for many motorcycles and other vehicles. Specification: Material: Plastic, Metal Color: Black Item Height: 55mm/2.17'' Hole Diameter: 10mm/0.4'' Package Includes: 1 Piece Motorcycle Mirror Base 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 0.5-1 inch difference due to manual measurement.(1 inch=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