DuraGrid Drain Top Non-Slip Matting | Interlocking Tiles | 12" x 12 x 1/2" | Made in USA | Colors: Grey, Beige, Black, Brick Red, Blue. DuraGrid® is manufactured with Anti-bacterial and anti-fungal agents to ensure a clean and healthy surface environment. Tiles UV Protectived, so great for Outdoor or Indoor uses such as Garages, Basements, Patios, Swimming Pools, Car Washes, or anywhere a self drain tile is needed.