Proven Performance and Quality - Significant Cost SavingsV7 printer cartridges are backed by over 40 years of high-performance manufacturing experience from ISO 9000 / ISO 14001 certified state-of-the-art facilities. Toners and key components are carefully selected matched and verified for optimal system performance before a design is released to production.After final assembly every cartridge is tested in equipment like yours prior to packaging. High-strength cartons with protective inserts ensure a safe arrival from our warehouse to your delivery location. Each box contains easy-to-follow illustrated installation instructions.By using our replacement toner cartridges you are also helping to protect the environment by keeping reusable non-biodegradable materials out of landfills. -Built to OEM specifications - with yield of up to 2200 pages-Fits printer model Brother HL-3040CN 3070CW; Brother MFC-9010CN 9120CW 9320CW-Replacement for OEM cartridge part number TN230BK-Environmentally friendly while easy on the budget without sacrificing quality!