Happu-store(TM) Bicycle Handle Bar Stem Carbon Fiber Gloss Spacer, 5 Pcs Fits 1-1/8" (28.8mm) heads, steerer tubes This sale is for 3 mm, 5 mm,10 mm,15 mm, 20 mm spacer Material: Full Carbon Fiber, Super light weight headset spacers Diameter: 28.8mm ( 1 1/8"), Net Weight: 30g (5 Pieces) Package Contents: 1 x 3 mm Wide Stem Spacer+1 x 5 mm Wide Stem Spacer+1 x 10 mm Wide Stem Spacer+1 x 15 mm Wide Stem Spacer+1 x 20 mm Wide Stem Spacer