Hydroton GMHT10L Hydroponic Grow Rocks， 10 Liter Bag (Discontinued by Manufacturer)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Strong pebble structure doesn't crush</li><li>Color packaging</li><li>8-16mm pebble size range</li><li>Measures 16-4/5-inch length by 12-2/3-inch width by 3-2/7-inch height</li><li>Hydroton grow rocks</li><li>Strong pebble structure doesn't crush</li><li>Records high and low points for both temperature and humidity</li><li>Measures 3.2-inch in length by 3.2-inch in width by 8.6-inch in height</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41OFtzmlc4L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51C1mtOGOOL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61bNEkDi87L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Tb03%2BrAVL.jpg" noproxy>