Faber Castel-Polychromos Colored Pencil Gift Box: Lightfast Colors. Color pencils can be laid down with delicate or strong strokes to unfold their vibrant colors. The leads are bonded to prevent breakage. They can be perfectly combined with graphite pencils. This package contains thirty-six 3.8mm colored pencils in a wide range of colors within one 7-1/4x6x1 inch case. Conforms to ASTM D 4236. Acid free. Imported.