pen set

Pen sets commonly come in both multicolored assortments and single-color packs. Example listings show multicolor packs and solid black options; one set explicitly lists eight colors: black, blue, red, green, pink, purple, lime green, and turquoise.

Pen sets typically include common tip types such as ballpoint, gel, and felt (porous) tips, depending on the set.

Tip sizes are shown either as numeric measurements (for example, 1.6mm or 0.7mm) or with common labels like Medium or Fine in the listings.

Many listings advertise smear-resistant or quick-drying inks. Example claims include ink that dries in as little as five seconds or formulas described as drying multiple times faster to reduce smudging.

Erasable thermo-sensitive ink can become colorless when exposed to heat (for example, from the friction of erasing); listings note it can turn colorless above 140°F and be restored by cooling to around 14°F. Erasing is done with the included eraser. The listings advise not to use this ink for legal or official documents.