Specifications Material Recycled black rubber with EPDM colored granules. Recycled content varies by color. Format Interlocking Tile, Tile Size Tile Size 37" x 37", 38" x 38" Sizes are approximate Thickness Tile Thickness 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm Weight Tile Weight Varies by Thickness Installation Options Glue Down, Reversible Interlocking