Pentel highlighter pen model S512 with envelope as pictured nib type highlighter Intensely colored ink accentuates outstanding text. Durable pen tip General pen size grip Suitable for highlighting narrow line spacing. Clip-on cap Convenient to carry, not lost. Can be used with both general paper copy paper and fax paper, line size 1-3.5 mm. (depending on writing angle) handle length 16 cm.