I ordered the pencil 0.5 to go in my Coleto multi pen. What I got was the 0.3
but didn't realize it until I tried to install it and the lead was so flimsy
that it broke off and fell out of the cartridge. Then looking at the packaging,
I saw that it said 0.3. I wasted my money on that, but I love the gel pen
refills and my multi pen. May not order another pencil refill until the
manufacturers are able to make it easier to install and use.