New old stock Toshiba-compatible toner cartridges for use in Toshiba plain paper copiers BD 1710, 1650, 2050, 2310, 2500, and 2540. Box contains 4 cartridges (300g each). Components include styrene acrylate copolymer, carbon black, polypropylene, and inorganic pigment. Box is unopened and in excellent vintage condition. Please note: This product is not manufactured by Toshiba but is compatible and trademarked under Toshiba America Information Systems Inc.