NPK Industries Raw Silica Fertilizers， 2-Ounce<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Flow able plant supplement that is used for horticultural purposes</li><li>Contains 45% silicon dioxide</li><li>Highest concentration of natural silicon dioxide available to the home gardener</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41Z8G8sqzyL.jpg" noproxy>