Model Name:for 21-23mm Handlebar Item Height:5cm Material Type:Aluminum alloy Item Type:Side Mirrors & Accessories Item Weight:60g Item Length:5.3cm Item Width:1.8cm 2pcs Universal Motorcycle Bike Rear View Mirror Bracket Adapter Holder Clamp Screw 22mm 7/8 Handlebar Feature: Universal Handlebar Hole Diameter: 22mm Mirror Screw Hole Diameter: 9mm Specifications: SKU: B030-05-B Condition: 100% Brand New Material: Aluminum Color: Black/Silver/Gold/Blue/Red/Purple/Orange Size:as the picture shows Package includes: 2pcs Bracket Adapter Holder Note: Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors