Features: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. Specifications: Material: Plastic, MetalColor: BlackItem Height: 53mm/2.08''Hole Diameter: 10mm/0.4''Package Weight: approx. 34gPackage Weight:1 x Motorcycle Mirror BaseNote:It is easy to install, but professional installation is highly recommended. 1This is a motorcycle mirror frame base with 10mm hole 2It helps isolates and dampens shock and vibration 3This design of the item allows user to mount to just about many things on your motorcycles 4Mounts are made of high quality material with a black coated finish, stainless steel hardware and plastic balls 5Most 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