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 6610-01-394-3808
NSN 5965-00-439-6287
NSN 5915-00-150-4694
NSN 6220-01-062-2077
NSN 6105-01-555-3916
NSN 5950-01-463-2796
NSN 5835-01-100-3265
NSN 5835-00-119-5585
NSN 6105-01-039-6552
NSN 5895-01-339-7734
NSN 5960-01-605-9921
NSN 6135-00-500-2082