Genuine Xerox Solid Ink 8400 Black Ink Sticks (6 sticks) Genuine Xerox solid ink sticks are an integral part of our simple, intuitive supplies system - featuring interlocking ink shapes and a unique numbering system, making the ink loading process easy. Our new high-performance solid ink formulations deliver brilliant color and razor-sharp text every time. Expect only the best from Xerox printers and genuine Xerox supplies - they're Made for Each Other(TM).