Hello and Greetings, It is nice to write to you. This is Vito from Italy. I would like to buy Toner cartridge compatible DocuColor 6550 7550. could you please send me the quotation from this with the details as below: Type, Color, colored, Do you have any quality assurance certificates? I hope we can cooperate in the near future. thanks & RegardsVitoEdizioni Printing Ltd Show More