Markal Valve Action Liquid Paint Marker is a medium tip liquid lead-free paint marker which dries in 3 minutes. These markers have brighter coverage compared to ink markers and are long-lasting as well as weather, water, and UV-resistant. Marks on all surfaces including metal, wood, glass, plastic, rubber, cardboard and paper. The durable nib permits fine line marking or bold, thick marks visible from long distances. The fiber nib is also replaceable which assures longer life and complete use of each marker. "flowmatic" valve releases paint on-demand for smooth, continuous marks and the sturdy metal barrel has a strong crimped barrel design that prevents leakage while withstanding heavy industrial use.