4-pack (4 Set) P42127401, P42127402, P42127403, P42127404, Okidata 42127401, 42127402, 42127403, 42127404 (Oki5100m) Y/m/c/bk Compatible Toner Cartridges Okidata Premium Quality Compatible Laser/Fax Toner OKIDATA 42127401, 42127402, 42127403, 42127404 The use of compatible items does not affect your printer warranty.