#4,000 page yield

HP 138X Toner Cartridge Review: Solid High-Yield Option for LaserJet Pro Owners

The HP 138X high-yield toner cartridge delivers up to 4,000 pages of solid black output for HP LaserJet Pro 3001 and 3101 series owners. If you're after reliable page counts and genuine HP engineering, this cartridge is worth knowing about — though third-party options exist at lower price points.