IRWIN Tools STRAIT-LINE Permanent Staining Marking Chalk， Indigo Blue， 4pound (4935524)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Great for extreme outdoor conditions because it can withstand harsh weather conditions and months of jobsite wear.</li><li>Flip-cap keeps the chalk in the bottle where you want it and stops it from spilling out in areas that you don't.</li><li>Flip-top cap also seals the chalk in an airtight chamber， keeping out moisture and reducing the risk of clumping.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/5109hT%2BDcAL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41HQZlIafIL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31KD41IANqL.jpg" noproxy>