ErgoDeck Open Grid has large openings for better flow-through use in wet, non-greasy areas, or dry environments where it is desirable for small debris to drop through the matting system. ErgoDeck is a system of 18" x 18" super-sized ergonomic tiles. These professional grade components are incredibly substantial, and are designed with an excellent durometer to prevent standing worker fatigue and encourage productivity. These larger components quickly and easily cover large areas and require less time and labor to install. The tiles are engineered to provide flexibility underfoot and reduce fatigue, yet also to withstand cart traffic and heavy usage. Tiles can endure up to 64 psi, the equivalent of a 300 lb. cart with 4" diameter wheels. ErgoDeck has LockSafe , a patented and totally effective, interlocking system that quickly "locks" tiles together, and keeps them together despite constant use. The tiles are accurately aligned for a neat, and seamless floor without maintenance or safety headaches.