An item composed of one or more materials, molded, compressed, and/or baked into a rigid covering of irregular shapes and sizes. it is designed to cover air ducts and/or air duct fittings used in air conditioning, heating, cooling, pressurizing and de-icing systems to restrict the dissipation of heat. it may completely or partially encase the item for which designed. it may be furnished with or without fillers, cement, and/or separate or attached accessories for installation, (excluding flexible air duct covering and rigid pipe and pipe fitting coverings used in construction and building materials). Excludes insulation blanket, thermal, aircraft; insulation pipe fitting covering, thermal; and insulation sleeving, thermal.
NSN 2925-00-899-4261
NSN 2925-00-408-9829
NSN 5950-01-608-5667
NSN 6110-01-628-2884
NSN 6610-00-055-4602
NSN 5950-00-982-0183
NSN 6220-01-242-0345
NSN 5915-01-244-9394
NSN 5998-00-248-7472
NSN 6240-01-140-0732
NSN 6105-00-297-3762
NSN 6105-01-040-6849