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 6240-00-845-9098
NSN 6135-00-010-5275
NSN 5950-00-809-9166
NSN 4140-00-718-0855
NSN 6620-01-100-2530
NSN 5925-00-622-0354
NSN 7035-01-227-2546
NSN 6110-01-397-8803
NSN 5985-01-331-9331
NSN 5910-00-619-5665
NSN 6110-01-097-3501
NSN 5915-00-833-3882