Description: 【High Quality】: Sealed aluminum foil can maintain flexibility, adhesion, and deformation and has good followability, high ductility, and toughness. 20m/65.6ft length is enough for your use. 【Widely Used】: This Metal Furnace Duct Tape is ideal for sealing hot and chilly air ducts, repairing metal seams, and insulating aluminum duct pipes. making this dryer foil tape ideal for insulation, heat sinks, Air Conditioner units, heaters, and vents. 【Sealing Tape】: Aluminum foil backing with a strong adhesive can be used as Vapor Seal tape for duct closure and to adhere properly to a variety of smooth and irregular surfaces. 【Insulation Barrier】: The foil backing is designed to resist moisture, and dust, strong, durable, and long lasting. Excellent flame retardant and Steam barrier, this aluminum duct tape is ideal for window type Air Conditioner and heaters, vents, and ducting. 【Multifunction Barrier】: The foil tape can be used for various applications, like general repair, sealing hot and cold air HVAC tape, pipe insulation systems, stainless and seams/joints, temporary repair of metal surfaces, etc. Specification: Material: Aluminum Foil Width: 4.5cm/1.77inch Length: 20m/787.40inch/65.6ft Package Includes: 1 Roll Aluminium Foil Tape(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.