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 5998-01-600-5096
NSN 5965-00-139-4870
NSN 5990-01-432-4984
NSN 2925-00-005-1618
NSN 5960-00-364-3647
NSN 6240-01-428-6318
NSN 5910-01-580-3716
NSN 6320-01-476-7702
NSN 6150-00-139-6036
NSN 6685-01-464-4272
NSN 6110-00-409-8125
NSN 5925-01-567-2312