... Minolta ,Kyocera, OKI, Sharp. Lenovo,Tally, Toshiba and so on .Quality description and assurance:Warranty: If any faulty products, we will ... Mechanical test to ensure the toners smooth operation and no noise, and to comply with ISO standards.2.Environment protection ... full heart, ensure in every aspects and details!---We always carry this constant principle! M236 laser chip for Sharp AR270 printer