Can't tell if it is food safe or not. Assuming it is, just make sure it isn't wax coated. Some is and that isn't good for heat. If it feels slick or is shiny on one side, it is probably coated.
Smooth Smoke BBQ Team, KCBS CBJ, 2-WSM, Cajun Bandit Conversion, wsm 2880, Smokey Joe Mini wsm, Old Country offset, several kettles.