Pixnor Pair of 10MM 78 Inch Motorcycle Bicycle Aluminum Handlebar Mirror Mount Clamp Color: Black. Material: Hard aluminium.Screw size: 8mm and 10mm. Suitable for handbear diameter max.: 22mm, 78 inch. Applicable to motorcycle, bicycle, E-bike etc. Simple, durable and practical to use, Can be easilly installed and convenient to use.