Please confirm multiple times before purchasing whether the product size, color, and style are what you need1.5inch C Size Double U-Bolt Rail 1.5inch Ball Mount with 1.5inch Round ball base- Medium14.5cm Double Socket ArmAttaches to any 1.5inch size ball component, including mounting bases and device holders; double ball and socket technology allows for near-infinite adjustability of your 1.5 inch mounting systemMade of marine-grade aluminum for durability and reliability in the most demanding environmentsDouble Socket Arm For Electronic Equipment, Motorcycle/Car/Engineering Machine/Tractor/agricultural machinery/forkliftBall size: 38.1mm / 1.5 inch, other size as blow photos. All is standard size and welcome buy from our store.Fit: Used on motorcycle, bicycle handlebar etc., and the items with 1.5 inch/38.1mm mount.U bolt fit handlebar:Big one: fit 13-33mmUsed on motorcycle, bicycle handlebar, and totally compatible for Color: BlackMaterial: Plastic+MetalPackage Contents:1 * MountOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.