The DR-221CL Drum Units are genuine/original color drum units designed for use with Brother printers. This product includes three color drum units in cyan, yellow, and magenta, as well as one black drum unit. It is compatible with various Brother printer models such as MFC-9330CDW, HL-3140CW, HL-3170CDW, MFC-9130CW, and HL-3180CDW. The print technology is laser, making it suitable for high-quality printing results. Additionally, this product comes with a California Prop 65 Warning.