100 fibreboard discs.

8mm - 12mm use the small cotter pins and the 12mm can use the extra small washer. 8mm and 10mm do not use washers.

15mm have an M3 hole and are therefore suitable for use with the medium cotter pin and also M3 nut and bolt.  We have a slightly shorter version of the M3 bolt for use with these discs as they are slightly thinner than the hardboard discs.