Staedtler Back-to-School 12 Brilliant Multi Colors Triplus 0.3mm Fineliner Pens with Case Staedtler Back-to-School 12 Brilliant Multi Colors Triplus 0.3mm Fineliner Pens with Case. Markers contain Dry Safe ink can be left uncapped for days without drying up Multicolored Pens are ideal for drawing, coloring in the classroom or adult coloring books. 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. Made in Germany.