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 5855-01-436-7621
NSN 5975-01-411-4728
NSN 5910-01-033-2104
NSN 5935-00-316-9410
NSN 6135-01-370-2599
NSN 6610-01-336-8027
NSN 5990-00-070-8325
NSN 5985-01-204-8432
NSN 5945-00-599-5697
NSN 6150-01-437-2556
NSN 5965-01-357-0684
NSN 5930-01-645-3123