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 5965-01-360-6568
NSN 5985-01-044-1677
NSN 6240-00-435-0433
NSN 6110-01-463-9010
NSN 6610-01-066-2970
NSN 2925-00-596-9775
NSN 5998-01-634-0604
NSN 5965-00-171-1265
NSN 6620-01-277-5799
NSN 6105-01-069-6302
NSN 6220-00-819-9325
NSN 5996-00-596-7018