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 5930-01-313-0484
NSN 5998-00-518-5118
NSN 5910-01-392-1150
NSN 6220-00-834-2838
NSN 6320-01-352-5653
NSN 4140-00-009-3586
NSN 6135-00-455-2425
NSN 6320-01-607-2978
NSN 5965-01-083-8006
NSN 6105-01-295-5307
NSN 6110-01-278-4774
NSN 6220-01-359-3009