Features: Bicycles stem top specially for bicycles front fork headset, well decorative your bikes. Various Types & Universal Size: The headset top comes with 20 optional types measure diameter of 31.8mm, please choose the correspondingly cap and match for you bicycles size Made of qualified aluminium alloy material, with strong & durable design, exquisite technology, wear resistance, accurate hole size to improve using experience. Our stem top package comes with screw to ensure you can use it and easily assemble on your bicycles and fixed tightly, alloy lightweight design to ensure riding smooth and reduce the wind resistance. Our stem top kits are suitable for most MTB mountain bikes, road bikes, children bikes and etc, easy use and assembly for leisure hobbyist. Specifications: Material: Aluminum Alloy Size: As picture shows Type: 1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23(1~20 is Bike Stem Top, 21~23 is Screw) Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Bike Stem Top