Triplus coloring pens Neon ballpoint pens, 0.3 mm, metal Clad, 6 point / PK, various colors Triplus Fineliner Neon Coloring Pens in Case, 0.3mm, Metal Clad Tip, 6/PK, Assorted. Markers contain bright neon-color Dry Safe ink can be left uncapped for days without drying up Staedtler Triplus Color marker and pen features triangular barrel for fatigue-free writing and the fineliner pen features line width of approximately 0.3 mm. Marker Staedtler Triplus Color marker and pen is acid-free with water-based ink and ideal for drawing, coloring in the classroom or adult coloring books. Made in Germany by Staedtler.