NSN 1560-01-615-5399

An item composed of one or more materials, molded, compressed, and/or baked into a rigid covering or irregular shapes and sizes. it is designed to cover auxiliary power unit exhaust pipes and the like to restrict the dissipation of heat. it may be furnished with or without fillers, cement, and/or separate or attached accessories for installation, (excluding rigid air duct coverings used in aircraft air conditioning, heating, cooling, pressurizing, de-icing systems and pipe coverings used in construction and building materials. excludes insulation pipe covering, thermal, aircraft; insulation pipe fitting covering, thermal; and insulation sleeving, thermal.