This pen has a crisp, chisel nib that makes forming beautiful calligraphy letters easy. It can be used for weddings, announcements, invitations and special-occasion writing. Details:BlackAvailable in multiple tip sizesWater-based inkPermanentNontoxic and acid freeConforms to ASTM D-4236 Size Information:Extra fine: 1.3 mmFine: 2 mmMedium: 2.5 mmBroad: 3 mmExtra broad: 3.5 mm