Irwin®, 64901, Marking Chalk, Standard, Blue, 8 oz Capacity, Bottle Package Type, Odorless Odor/Scent, 80 to 85% Calcium Carbonate, 15 to 20% Ultramarine Blue and 0.1 to 1% Silica
ITEM FEATURES:
- Interior or exterior use
- Marks are temporary
- Provides great visibility
- Powder type
- 8.5 - 9.5 pH range
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