This rubber sheet is made of Buna-N and has a tensile strength of 1,000 psi. It has an overall length of 36 inches, an overall width of 12 inches, and a thickness of 3/8 inch along with a plain backing. It is black and meets the standards for ASTM D2000 BF 707. Plus, this rubber sheet has a maximum temperature of 250 Degrees F, a minimum temperature of -30 Degrees F.