This is a compatible 6-pack of replacements for Xerox WorkCentre C2424 black solid ink sticks, known as 108R00664 or 108R664. These solid ink sticks deliver brilliant, professional color output and are manufactured 100% brand new. Designed to provide consistent quality page after page, they are a cost-effective alternative to genuine Xerox products. Backed by our 100% Quality Satisfaction Guarantee, these high-quality solid ink sticks are manufactured in the United States.