This high-quality drum unit is the perfect addition to your Brother printer. Designed specifically for use with the DR-3100 model, this unit ensures that your printed documents always look sharp and professional. The black toner provides a striking contrast against white paper, making text and images more legible and easier to read. The OWA Armor brand is known for its durability and reliability, making this drum unit a wise investment for anyone who values quality. It is compatible with Brother printers and comes with a single unit in black. Whether you're printing important documents for work or school, this drum unit is sure to deliver excellent results every time.