This black rolled flooring is an eco-friendly product made from recycled waste tires. x 4. x 4 ft. Its easy installation makes a simple DIY project that can be done by almost anyone! With a thickness of 3/8-inch, this roll of rubber offers a superior flooring option that is made from recycled materials, can be used in numerous applications, and is an easy DIY project which makes it even more affordable! "Elephant Bark" Rubber Flooring - 3/8 in.