Speedset 7-1/2" Vertical Track for 4" Glass Block - 6-Pack

Building 4-inch thick glass block panels has never been easier, thanks to these Speedset glass block assembly components. Want to add a touch of beauty to your home, but you're unsure if you can manage the task? The Speedset silicone system makes assembly and installation easy! The 7-1/2-inch vertical track is used to set and align the vertical space between columns of blocks, and is locked in place with Speedset glass block sealant.