Emgo The Big One Mirrors Set Yamaha Emgo The Big One Mirrors offers a larger mirror surface for your rear view. The 10mm threaded base provides a wide-ranging application. Features: Chrome finish Rectangle Head Shape Curved Stem Bend Includes both left and right side mirror, sold as pair Specs: Mirror Head Size 4.25 W x 6.25 T Stem Length 6 Thread Size 10mm x 1.25 (Left Hand) Screw-in Handlebar Mount Flat Curvature Mirror Note: For Yamahas with one left hand and one right-hand 10mm threaded holes only.