This product is either discontinued or we cannot get that from suppliers.
Hewlett Packard CART307BK Laser Toner Cartridge, Yield 2500 Pages, Coverage (%)-5, Black, Compatible Printers CANON Laser Shot LBP5000 , CANON Laser Shot LBP5100.
The Canon CART307BK Black Toner Cartridge is a premium quality designed for rich colours and long lasting results. Reliable and consistent, these cartridges are perfect for high quality print documents, and will work optimally with your printer.