Emgo Universal Chopper Oval Mirrors Theses are chopper style oval mirrors that screw-in. Constructed from a die-cast steel with a chrome finish. Mirrors are fully adjustable and have a 10mm mounting thread. Features: Die-cast aluminum Left and right sides are sold separately Specs: Flat Mirror Curvature Oval Shape Mirror Head Size: 4 1/2 W x 2 T Stem Length: 4 1/2 10mm x 1.25 thread Note: Left-handed threads are for some Yamaha right side mirror applications.