These are a replacement for you current DU bushing. They are very durable and offer low friction for better performance. These are included in J-TECH HD Mount Kits.
This 12mm size is compatible with Bos BOS up to 2016 (check your shock as there's some cross over), some X-Fusion and pre 2012 Manitou shocks.
Save £'s on genuine parts and get a longer lasting part!