Lexmark T630, T632 & T634 supplies are designed for the highest quality output, page after page, thanks to technical experience, high production standards & rigorous product testing. The supplies are designed for easy customer installation & quality performance, from the first page to the last. The 5, 000-page Print Cartridge makes an excellent choice for excellent choice for customers with unit price sensitivity & low print volumes. Return/ Prebate cartridges are sold at a discounted price vs. the price of regular cartridges in exchange for the customer's agreement to use the cartridge only once & return the cartridge to Lexmark for recycling once it's empty. All toner boxes ship with prepaid postage labels for customers to return their empty cartridges for recycling.