['The Brother TN580 high yield cartridge replaces the TN550 standard yield cartridge','Page Yield: 7,500 per cartridge Shelf Life: 24-36 months per cartridge','All LD branded products are backed by a 100% satisfaction and LIFETIME guarantee','With LD Products, you can shop online for ink and toner products knowing youll receive the highest quality products available with customer service and support that is unequaled by our competitors.','LD Products is a leading provider of discount printer ink and toner for virtually every inkjet or laser printer on the market. We carry a full line of printer inkjet cartridges, inkjet refill kits, laser toner, fax toner and countless other printer supplies that allow you to save money, without sacrificing quality.']