SKU: CTG42AM

For HP 4240 4250 4350. Manufacturers DO NOT recommend using drill and fill. The drill and fill ink is NOT designed to work with the manufacturer’s print head technology and can cost ruin your printer. Twotonellc.com does not sell "drill and fill" kits or cartridges. Twotonellc.com toner cartridges are produced by professional engineers and technicians who test cores and components for structural integrity, clean empties to OEM standard, replace major components (such as drums and blades), refill with toner and test again before packaging to ensure a product which meets quality standards. Hewlett-Packard