Black Diamond Motorcycle Mirrors for BMW R100, R100R, R100RS Mirror lens is glass and provides more magnification than standard mirrors thereby enhancing your safety, by increasing your field of view. Mirror head has a unique swivel head design which allows for easy adjustment. Mirror head is designed for easy adjusting by pivoting in/out and can rotate 360 degrees Stylish, black, diamond shaped mirrors with slotted stem. Sold as a pair Dimensions: Diameter of glass: 6.25" (159mm), Height of glass: 3.5" (89mm), Height from base of stem to top of mirror head: 6.5" (165mm), Length of threads: 3/4" (19mm), Width of threads: 10mm metric threads 100% Money Back Guarantee! No questions asked!