Artline Plumbers Red Marker Pen Bullet Nib

City Plumbing

Artline Plumbers Markers are specially designed to write on wet surfaces, drying instantly. The ink stays waterproof after drying to ensure marks remain, making it ideal for marking on non-porous surfaces.

Amazon

1.5mm line width Writes on wet surface Waterproof Red ink Writes on plastic metal and copper Break resistant barrel