Item Name: Alloy Accessories Bicycle Headset Washer Adjusting Washers Bike Fork Dust Cover. Inner diameter: 29mm, Outer diameter: 34mmQuantity:6pcs/set (3pcs 0.3mm +each 1/2/3mm for 1pc)Material: Aluminum AlloySize: 0.3/1/2/3mmColor: SilverBrand new with high qualityPRODUCT INTRODUCTION:If your headset upper is too low, the headset cap against the bike frame! You can use this adjusting washer. Suitsble for top outer diameter 28.6mm forkPackage Include:6 x Bike Adjusting Washers (3pcs 0.3mm washer, 1/2/3mm each 1pc)Notice:1.Transition: 1cm=10mm=0.39inch.2.Please allow 1-2cm error due to manual measurement and make sure you do not mind before ordering.3.Please understand that colors may exist chromatic aberration as the different placement of pictures. *Please make