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Key FeaturesHardmark blue is a Crescent Lufkin proprietary marking chalk designed to be a brighter blue for increased line visibility regardless of
Lufkin CB08BA 8 oz HardMark Blue Chalk Refill
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HardMark Blue is a Crescent Lufkin proprietary marking chalk designed to be a brighter blue for increased line visibility regardless of the light
Crescent Lufkin 8 oz HardMark Blue Chalk Refill - CB08BA