RXL SL 4pcs/lot Bicycle Headset Full Carbon Fiber Bicycle Bike Carbon Washer Spacer 5/10/15/20mm for 1-1/8 Forks Material : Full Carbon Fiber Size: 5mm 10mm 15mm 20mm Weave: 3K Glossy Package: 4 Piece Headset Spacer Weight: About 20g