The package consists of 9 Packs Thick Mats For Wet And Steam Blocking made of high-quality Foam. Are you struggling with flimsy, hard-to-use blocking mats? We construct our extra thick, heat-resistant blocking boards to be sturdy enough to stay together through any project. The extra thick dense foam makes them superbly lightweight and lastingly durable, so you can connect them into numerous shapes and sizes in a snap! Say goodbye to uneven edges and improperly measured projects! With our product, you’ll get straight, precise edges every time. We’re the first blocking boards with grids in two colors, so it’s easier than ever to eyeball your grid alignment for detailed accuracy. Every blocking mat contains exact grid lines with 1-inch square edges, making them perfect for beginners.