Upgrade your HP LaserJet printer with this 4MB Edo RAM from HP. The C4135AX model is compatible with HP LaserJet 1100, 2100, 4000, and 4050 printers. This memory module is ideal for those who need to handle large printing tasks and want to improve their printer's performance. The module is easy to install and will provide your printer with additional memory capacity. Whether you're printing reports, graphics, or presentations, this RAM will ensure your printer runs smoothly and efficiently. Don't wait any longer and upgrade your printer today with this high-quality HP RAM module.