Brother TN-620 Toner Cartridge - Black (Genuine) The Original Brother TN-620 Toner Cartridges are chemically produced and magnify printing capacity and efficiency. The Toner Cartridge is cautiously equalized to deliver a balanced outflow. This way toner is evenly dispersed on to the paper. The TN620 Toner Cartridges are a good way to ensure optimum printing results.TLC carries an extensive line of Genuine/Original Brother Supplies at Super Low Prices. All orders are accompanied with a 100% Guarantee, On Time Delivery, and Order Tracking. So, buy with confidence from TLC, a leading distributor of Brother supplies.