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With the Stanley 1-47-404 chalk powder, you can quickly snap crisp, highly visible layout lines across the job site. This 115 g bright red refill is specially formulated for outdoor masonry and construction work on rough surfaces like concrete, stone, and wood. Its water-resistant, indelible formulation adheres strongly to ensure your markings remain intact through rain and changing weather conditions. Thanks to the practical pouring spout, you can refill any standard chalk line reel easily and cleanly without spills, allowing you to lay out your work accurately and efficiently.