The GoFlowmo Compatible 148X W1480X Black Laser Toner 2 Pack is designed for use with HP Pro 4001 printers. This black toner cartridge is compatible with various HP models such as 4001dn, Pro 4001n, 4001dw, 4101fdw, and MFP 4101fdn. With a laser print technology, this toner provides high-quality black prints for professional documents and images. The GoFlowmo brand ensures reliable performance and compatibility with your HP printer, making it an ideal choice for your printing needs.