The product is a lot of 4 TRU RED TRCE505A compatible toner cartridges designed specifically for use with HP 05A printers. These cartridges are black in color and are compatible with the HP 05A model. TRU Red is a brand known for producing high-quality printer supplies, making these toner cartridges a reliable and cost-effective choice for those in need of replacement cartridges for their HP printers.