I have black ink with hexagon shape instead of a circle on the cartrage. It is almost double in size compared to other colors. What is difference?
The box doesn't have the hex shape but the ink cartrage does. How will I know if it's the hex shape unless I open the box?
It's confusing; it appears that there were some cartridge size changes made. My c309 printer has an extra large space for the black which will accommodate both the regular and double size cartridges. I have used both sizes without any issue.