1.Multi-size selection: come with 6 different sizes, including 2mm,3mm , 5mm , 10mm , 15mm , 20mm , multi-size to adjust the appropriate height 2.Material: New 100% carbon fibre spacers,light weight, good strength and well temperature resistance, good impact resistance 3.Appearance and performance: automatic cutting, smooth edge, fit most of the road bicycles, delicate texture and to use 4.Compatibility: bicycle spacers with smooth and exquisite workmanship, fit most of the bicycles. Total Weight: About 45g Thickness: 3mm Inner Diameter: 28.6mm Outder Diameter: 34.6mm : 3K Glossy. Application: 1-1/8inch (28.6mm) Colour:black Material:carbon fiber Package Contents: 3 x 2mm headset spacer 2 x 3mm headset spacer 2 x 5mm headset spacer 2 x 10mm headset spacer 1 x 15mm headset spacer 1 x 20mm headset spacer Only the above package content, other products are not included. Note: Light 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.