6 oz. Strait-Line® Permanent Staining Marking Chalk, Midnight Black | IRW-4935520

Irwin Strait-Line Marking chalks have a newly engineered flip-top cap that keeps the chalk in the bottle where you want it and stops it from spilling out in areas that you don't. The flip-top cap, available on all Irwin STRAIT-LINE chalk bottles, seals the chalk in an air-tight chamber, keeping out moisture and reducing the risk of clumping.

• Hi-flow nozzle cap improves chalk flow, ensures quicker chalk fills, and less clumping
• Withstands months of weather and jobsite wear and tear
• Reduces need for additional sealant
• Color: midnight black