20008 Old Brayman Drystack - Large, Irregular Cut Rock Vac-U-Form™ Styrene - Single Use. ABS Plastic - Up to 15 reuses. Max Depth: 0.75" Stone Sizes: 6.5"-29" W. x 1.5"- 7" H. Grout Width: Varies Part Size: 96"W. x 48"H. Click here for cut-sheet