Fengek 15 Pcs Headset Spacer For Bicycle, 7 Sizes Carbon Fiber Road Bicycle Stem Headset Spacers Kit For 1-1/8 Inch Stem, 1Mm 2Mm 3Mm 5Mm 10Mm 15Mm 20MmSpecification Material: carbon fiber Inner Diameter: 1-18 inch286mm Width: 1mm 2mm 3mm 5mm 10mm 15mm 20mm Quantity: 15pcs Package includes: 2 x 1mm Headset Spacer 2 x 2mm Headset Spacer 3 x 3mm Head..