Lightfast and permanent, conforming to ISO 14145-2
Water-based, fast-drying, acid-free black pigment ink
Perfectly designed ink feed system
Refill system includes new tip
Four line widths: 0.25 mm, 0.35 mm, 0.5 mm, 0.7 mm conform to ISO 128 and 3098
Unique tip encased in solid metal sleeve suitable for use with templates. Refill made for STA-712 Professional pen #716-025BK