Rock Shox 12mm Eyelet Mount Hardware.
Features
3-piece design hardware for mounting 2003-2011 Rock Shox Ario*, Bar, MC, and Pearl rear shocks with 12mm eyelet dimensions *(not for newer '08+ models using 1/2" (12.7mm) hardware: Vivid, Monarch, 2010+ Ario)
Sized by bolt diameter (M6 or M8) and frame mount-ID width (in mm)
2 hardware kits required per shock: 1 for each eyelet
Specifications
Bolt Size: M6, M8
Frame Mount: 22.2mm, 24mm, 28.6mm, 30mm