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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.
IRWIN® Marking Chalk, 5 lb Net Content, Powder Form, White, Odor/Scent: Odorless, Composition: Calcium Carbonate, Silica (Crystalline Quartz), 2.7 to 2.71 Relative Density
| Color | : | White |
| Composition | : | Calcium Carbonate, Silica (Crystalline Quartz) |
| Container Type | : | Shelf Pack |
| Form | : | Powder |
| Net Content | : | 5 lb |
| Odor/Scent | : | Odorless |
| Relative Density | : | 2.7 to 2.71 |