... 9001 ,msds etc7,after sales service ,if any defactive rate ,we would send the replacement of good without any shipment cost ,8 ... also supply many other black or color toner cartridges. welcome to visit our website or inquiry us online.Advantage and ... pre-tested prior to leaving the factory.2) We guarantee for 100% replacement or refund for any defective products3) Prompt delivery (Express, airway ...