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.
|Compositions||:||Black Iron Oxide-Pigment Black 11, Talc, Silica|
|Package Size||:||6 oz|
|Relative Density||:||4.4 to 4.6|