Features:The sheet is a convex mirror with wide angle, and its field of vision is wider and its deformation is moderate.There is a 3todimensional 360todegree adjustment axis, reflected light without blind spotsEasy to install, just loosen the screws to fix the mirror on the handlebar, and then tighten the screws.Suitable for 17.4to22mm or 15to35mm bicycle handlebar Specifications:Material: Stainless Steel Color: black. Applicable diameter: applicable to Package included:1 or 2 x Rearview Mirror.Notices:1) There could be some slight differences in the color tone of the pictures and the actual item. 2) Please allow 1to2mm differs due to manual measurement, thanks. 3) If there is any problem with the product, please contact me before you leave a comment, I will do my best to solve the problem for you.Thank you for your understanding.