For use in KYOCERA TASKalfa 3500i, 3501i, 4500i, 4501i, 5500i, 5501i, COPYSTAR CS3500i, CS3501i, CS4500i, CS4501i, CS5500i, CS5501i, NEC IT3550 Compatible Toner replacement for Kyocera TK-6307K and COPYSTAR TK-6309K; PREMIUM Toner kit contains 1 BLACK cartridge PAGE YIELD: 35,000 pages each cartridge, based on the ISO/IEC 19752 industry standard of 5% page coverage The Smarter Choice, Made to Match OEM performance. Lower your Carbon Footprint- buy Made in USA Toner.