A Plus - Compatible Dell 3000 / 3100 Toner Cartridge Set (1 Black 1 Cyan 1 Yellow 1 Magenta - 4 Pack) for use in Dell 3000cn & 3100cn Include: Black, Cyan, Yellow, Magenta Replaces OEM # 310-5726, K5362, 310-6874, K4971. APLUS is the only manufacturer and seller of this product listed. This listing is specifically created for the A Plus Toner of which we are the owner and distributor. This is a completely green product. All products are remanufactured back to new condition and are friendly to the environment. We save you money while helping the environment. WARNING: Avoid poor imitation products from other sellers; order directly from APLUS to receive the product listed and ensure quality. APLUS is the only manufacturer and seller of this product listed. This listing is specifically created for the APLUS brand, of which we are the owner and distributor. This is a compatible or re-manufactured cartridges. It is NOT OEM products. We offer 100% SATISFACTION GUARANTEE if somethings not working as long as you think it should, well send you a free replacement or give you full refund within 6 month of purchase.