24" x 5 mm 2-9/16" round center hole with key way, plain disc 24" x 5 mm 1-9/16" round center hole plain disc 22" x 4 mm 2-9/16" round center hole with key way, plain disc 22" x 4 mm 1-9/16" round center hole, plain disc 26" x 6 mm 27 mm round center hole with 4 square hole/13/5 m plough disc. PCD. 228.6 mm or 9"