3/8" OD x 100' Orange Polyethylene Jacketed Copper Tubing for Oil Service Uniquely designed to protect both the environment from oil contaminants and the copper tubing from corrosion Features an innovative concept in fuel oil tubing Special grooves between the coating and the copper assist with leak detection should a line failure occur Continuously line-marked with tube contents, ASTM specification, size and lot number, which allows the tubing to be traced Inner grooves assist in early leak detection, protects the environment from oil contaminants