2 Black Round 4" Motorcycle Mirrors Pair for Yamaha XS400,XS500 Black, round motorcycle mirrors, featuring a sleek design and large 4 & 1/4 inch view area, allowing to clearly see what's behind you. Sold as a pair (two pieces) Mirror head is fully adjustable allowing you to easily adjust the mirror lens up, down, left, and right and completely around. Mirror head tension is adjusted via a screw, located on the back of the mirror head. Once tightened, the mirror head will remain right where you want it, preventing it from getting loose Dimensions: Diameter of glass lens (horizontally): 4.25" (108mm), Length of stem (not including threads) diagnolly: 7.5" (191mm), Height of mirrors: 9 inches (229mm), Length of threads: 1" (25mm), Size of threads: 10mm metric Mirrors have a solid metal stem, are weatherproof and feature a distortion free glass lens 100% Money Back Guarantee!