The 138A Black Toner Cartridges 3 pack by goflowmo is compatible with HP MFP 3101fdw, 3101sdw, and 3001dw printers. This laser print technology ensures high-quality black printing. Each unit is designed to work seamlessly with the specified HP printer models, providing reliable and consistent results. The convenient 3 pack offers long-lasting toner cartridges to keep your printer running smoothly.