Speed Merchant Preload Adjuster - Machined Finish SM39A-2CNC machined out of 6061 aluminum These adjusters will replace your stock fork caps and allow you to fine tune your front suspension, with almost an inch of preload adjustment You can dial in your front end preload without having to remove the stock caps and cutting spacers, with a turn of the adjuster, up or down Comes with O rings, and ready to install Made in the USA