Gub559 Lightweight Bicycle Handlebar Extender Bike Lamp Holder Mount for Bike Mounts, GPS Units, Lights, Cameras or Smartphone Cases-with 2 CNC Alloy Clamps This mount kit includes 1 carbon tube,2 CNC alloy clamps. The speed-bar is removable and creates space for you for more accessoires. It is for size 31.8mm,5 colors for your choices. Dual clamps for a strong and secure hold. Easy to install - tools are included