This set of pens are Staedtler Triplus Fineliner Pens. I love them because they're fine tip and don't bleed through paper. I also use them in my planner. I am a bit bummed because there isn't a purple pen. I could do without the yellow and would so switch it for purple. The case can be made into a stand, which is super cool. And they are dry safe -- if they're left uncapped they won't dry out (within a few days according to the packaging).