Thank you for your message and interest in ordering with us. Because these are compatible cartridges, the part number will be slightly different; however, this is in fact the same cartridge as the TN350 that your Brother printer takes. 'LD' is the name of our company (LD Products) and we include this on all products.
Should you have any further questions or concerns, please do not hesitate to contact us; we are here to help! Thanks again for taking the time to reach out to us. Be well and have a wonderful day! 888-321-2552 M-F 5am-7pm & Sat-Sun 4pm-7pm PST
Answered on 7/7/2014 by Jasmin