Layout Block Bundle<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>LAYOUT BLOCKS - Holds glass pieces tight to keep panels straight.</li><li>CONFIGURE TO FIT - Configure to fit virtually any size panel.</li><li>MULTIPLE SIZES - Includes multiple sizes: four 3"， four 12"， two 17" and two 23" Add-On Blocks.</li><li>EASY TO USE - Push pins insert easily into Homosote board.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31ZkfPw6h4L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/513Scj7YDNL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51Q7vsDlT9L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51cT1TFWFAL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41iEtlve4rL.jpg" noproxy>