A Shock Eye Bush is also often called a DU Bush. Fits all Manitou shocks. RockShox used a 12mm (internal) DU Bush from about 2003 until about 2008. Before that they used a 10mm bush, after that a 1/2" (12.7mm) bush.
Internal Diameter: 12mm. External Diameter: 14.2mm. Width: 11.8mm. Weight: 3g.
Suitable Installation Tools: Shock Bushing Tool and Shock Bush Driver 12mm.