The Irwin Strait-Line marking chalk in an 8oz /227g plastic tub. The lid has a flip top to make dispensing the chalk easy into self-marking chalk lines.

• Suitable for interior or exterior use
• Marks are temporary and will wash away with a few days of rain
• Provides great visibility
• The plastic tub is oval shaped, so it won’t roll away on a rooftop
• 8oz – Easily fits into a toolbelt

Blue chalk is generally considered to be general purpose and is temporary - ideal for use on surfaces which will be visible once the job is done.