Artline Exterior Black Marker Pen Bullet Nib

City Plumbing

Ink of the Artline Exterior Marker is specially designed to be resistant to UV light, eliminating fade, and also dries instantly so wont smudge in outdoor environments. It also stays waterproof after drying to ensure marks remain.

Amazon

1.5mm line width UV resistant Black ink Instant drying Wries on wood, plasic, metal and stone Break resistant barrel