Brother WT-100CL Waste Toner Pack for HL-4040CN, HL-4070CDW Series - Retail Packaging Consumable Type: Waste Toner Collector Printer Technology: Laser Printer Compatibility: HL4040CN Yield: Up to 20000 pages at 5% coverage approx. 20,000 page yield @ 5% page coverage per color on letter size paper approx. 20,000 page yield @ 5% page coverage per color on letter size paper