|Country of manufacture||Malaysia|
|Material||Metalized Polyester, Gum, Wire, Plain Polyester, Aluminium Foil|
NKK Insulation also produces high quality flexible duct for HVAC industries which is widely known as NKK Duct. NKK Flexible Duct is manufactured by laminating Aluminum foil two ply of polyester film over a high carbon steel wire helix to give excellent strength and flexibility. It comprises of two concentric Helical Duct that house the fiberglass wool between them, making it a superior and sturdier product. NKK Flexible Duct can be fire retardant or NON-fire retardant. NKK Duct manufactured from two layers up to four layers of high grade metallised polyester or aluminium foil composite bonded together with glue encapsulating high carbon steel wire to give excellent strength and flexibility.