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 5910-00-411-0841
NSN 5985-01-430-2570
NSN 2925-01-004-1683
NSN 6220-01-339-2805
NSN 6685-00-985-5221
NSN 6135-00-299-6918
NSN 5990-01-207-8684
NSN 5915-01-455-0002
NSN 5915-00-269-4463
NSN 5999-01-167-9508
NSN 6620-01-268-5019
NSN 5915-00-728-6229