For use in Ricoh Type MP C3001, MP C3501, 841578, 841423, 841422, 841421 PREMIUM Toner kit contains 1 of each CMYK cartridge: 460gm black, 370 gm each color Made in USA Toner 22,500 page yield/black, 16,000 page yield for each color, based on the ISO/IEC 19798 industry standard of 5% page coverage