TOPCABIN Bicycle Mirror,1 pc Handlebar Bar End Bike Mirror Adjustable 360&deg; Rotation Bicycle Rearview Mirror (Left Right Available) Fits inside handlebars with 17 to 22.5 mm inside diameters Mounts onto bar end of handle bar Left right available Wide view any viewing angle;A variety of colors black, yellow, red, blue Material:High quality PC material Please remove the plastic film before you use the mirror.