Lexmark laser toner for: CX410de/ CX410dte/ CX410e/ CX510de/ CX510dhe/ CX510dthe. 2,500 page yield. Return program cartridge. Return Program Cartridges are sold at a discount vs the price of regular cartridges, in exchange customer agrees to use the cartridge once and return it to Lexmark for remanufacturing or recycling.