hp 131x laserjet printer toner black, double pack with hp 131 laserjet printing supplies, you can print professional-quality documents and marketing materials at home and in the office. these reliable cartridgees keep you productive, avoiding problems, reprinting, and wasting time and supplies. in addition, you can rely on easy ordering, replacement and recycling of supplies. colors black yield (black &, white) on tape: 2,400 pages product weight 1.2 kg operating temperature range 15-25 ? c operating humidity range relative humidity 20 to 80% compatibility hp laserjet pro 200 m251 color printers, hp laserjet pro 200 m276 multifunction color printers