1PCS Carbon Fiber Bike MTB Headset 1\/8!#!amp!*!quot; 5-10-15-20mm Stem Washer Spacer KitSpecification:Material: Full Carbon FiberInner Diameter: 28.6mm ( 1 1\/8!#!amp!*!quot;)Color:as the picture showsPackage includes:1 x Stem Spacer