LUFKIN 2.5 lbs HardMark Blue Chalk Refill CB25BA 2.5 lbs HardMark Blue Chalk Refill FEATURES: HardMark Blue is a Crescent Lufkin proprietary marking chalk designed to be a brighter blue for increased line visibility regardless of the light condition or surface High visibility blue chalk designed to be three times more visible than standard chalks Unique bottle geometry prevents the bottle from rolling on sloped surfaces
