Q3964A Laser Drum Cartridge for Hewlett Packard Laser Cartridges is ISO-9001 certified. It replaces the original Hewlett Packard (HP) Q3964A Drum. The compatible replacement Q3964A Laser Drums (also known as generic) are specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM (Original Equipment Manufacturer) standards for the Q3964A and offer high-quality printing results. Containing new drums and other internal parts, plus a new smart chip, they are an economical alternative to expensive OEM Q3964A HP Laser Drum units and supplies, and offer big savings over brand-name Q3964A Laser Drum units and supplies. This compatible drum for Q3964A has a 'Smart Chip' that makes continuous adjustments to optimize print quality and enhance reliability and cost effectiveness as well as monitor toner levels. Our Compatible Q3964A is backed by a One Year 100% Satisfaction Guarantee and the use of Our compatible Q3964A will not void your printer's warranty.