MULTI-SIZED PACKAGE: This pack contains 7 different sizes, 1mm, 2mm, 3mm, 5mm, 10mm, 15mm, 20mm, the small spacer earphones allow you to have more precise height adjustmentAppearance and Performance: Automatic cutting, smooth edges, suitable for most road bikes, fine texture, durableBicycle handlebar spacer material: carbon fiber weave, beautiful appearance, good quality, light weight, good strength, good temperature resistance, good impact resistanceCarbon Fiber Bicycle Headphone Spacer Features: More corrosion-resistant, harder than aluminum alloy headphone spacers, lighter than headphone spacers made of aluminum alloySize Details: Inner Diameter Approx. 28.6mm, external 34.9mm, total weight approximately 45gMULTI-SIZED PACKAGE: This pack contains 7 different sizes, 1mm, 2mm, 3mm, 5mm, 10mm, 15mm, 20mm, the small spacer earphones allow you to have more precise height adjustmentAppearance and Performance: Automatic cutting, smooth edges, suitable for most road bikes, fine texture, durableBicycle handlebar spacer material: carbon fiber weave, beautiful appearance, good quality, light weight, good strength, good temperature resistance, good impact resistanceCarbon Fiber Bicycle Headphone Spacer Features: More corrosion-resistant, harder than aluminum alloy headphone spacers, lighter than headphone spacers made of aluminum alloySize Details: Inner Diameter Approx. 28.6mm, external 34.9mm, total weight approximately 45g