When you get them, cut 4 of the tips down about 1/2 an inch. Screw the 4 micro tips over the top. You're going to get a bunch of little metal rods, I'm almost positive you use those to clean out the tips. Or you throw them in the tips to keep the paint from drying out. Haven't used those rods yet so don't quote me on that. Just pour a little bit of paint in the bottle. Give it just a light, consistent squeeze and you're good to go. Just try not to let it sit in one spot once you squeeze it, keep it moving or else it'll spread in that spot. Use the smallest tip for 1/4 inch letters.