High quality refills for your Cross pens. Many Cross refill shapes are available in multiple types, so ballpoint pens that use the standard screw-in refill can also use their hybrid Satnink refills, and Selectip pens can choose between ballpoint, gel, fineliner and even highlighter refills.
The Switch-It mechanism also lets you turn most Cross ballpoint pens into pencils by fitting it in place of the standard ballpoint refill - and it even adds an eraser!