Each Multi-Fit Aluminum Elbow Cover is designed to fit over 90° insulation elbows with a specific outer diameter, regardless of the pipe size, use of long or short radius pipe elbows, or insulation thickness. The thirteen sizes of JM Multi-Fit Aluminum Elbow Covers will fit 111 combinations of NPS and insulation thickness up to a nominal outer insulation diameter of 12.75 inches. Like our Aluminum Jacketing, Multi-Fit Aluminum Elbow Covers are a premier protective jacketing for insulation pipe systems and are a crucial accessory to complement the aluminum jacketing. They help protect the insulation and underlying pipe from physical damage, UV exposure, corrosive enviroments, and water. They can also reduce the time and labor needed to install a metal jacketing system.