Spare Part: Shim
Holder Type: P Clamp - a P Clamp holder features a Lever, Lever Screw, a Shim/Seat and a shim pin (Small curved piece of sprung metal to retain the shim)
Insert Shape, Relief & Size: C N 12 (e.g. CNMG120408)
Examples of holders this shim would fit:
A25T PCLNR/L12,
PCBNL/R2020K12,
PCLNR2525M12
(Note the letters and numbers in the codes in bold relate to the info provided above)