Firstly one pen was burst which they refund partially. But the pens themselves are rubbish for highlights as you can see after multiple layers it still wasnt very white. The ink flow isnt good either had to keep shaking it after less than a cm of thin line. I wouldn't recommend.

I thought I would need to use the big tip but the smaller worked better for my use.I didn't realize I got black too! Pretty good bargain!What you see in the pic is one coat over black plastic. I haven't even touched it up yet for mistakes or applied a second coat , which I won't..maybe a tad touch up only.The middle of the pen is clear so if you look carefully you can literally see the paint and you know it's liquid after shaking.Tip..while in use if you tip starts to lose ink don't push it all the way down as that will deliver too much, rather only push a tiny bit and a new flow of paint will replenish the tip.First time use you may need to fully depress as many as 3 times, just don't overdo it or you'll have more paint than you want!

My tool box has black on black etching for tool sizes on a plastic surface. I bought these to re-write the tool sizes in contrast. The markers have two tips, thick and thin. The thin tip was especially fine which made it easy to write the tool sizes in very limited space.The ink flowed smoothly, no blotching. it dried within a minute and did not rub off. A rag and alcohol completely removed the ink when I needed to. Great product! exactly what I needed.

Bought these to write on a t-shirt. The white did ok but the black really showed up and dried quickly. Excellent purchase. Made me very happy!

These are the best white markers I've ever used