Our headset spacer is made of highquality aluminum alloy material, sturdy and to use. They are lightweight and easy to install, having smooth and exquisite workmanship. 4 different sizes into one pack could fit for your demand and meet different needs. They are suitable for 28.6mm ycle front stem fork. Specifications: Condition: Brand New Material: Aluminum alloy Color: Black, Red, Blue, Silver (Optional) Quantity: 4pcs 4Pcs/Set Size(Height): Approx. 5m/10mm/15mm/20mm Package Weight: Approx. Suitable for: 28.6mm ycle Front Stem Fork Package Included: 1 x Set of 4pcs Headset Spacer Please Note: 1. Please allow 01inch errors due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.