Hi-Velocity 20020120025 2″ x 25′ R4.2 Supply Tubing Extension (1 Piece)

Hi-Velocity Flexible Duct can be installed quickly and easily, delivering the air quietly with a sound absorbing inner core. The inner core is made of a double lamination of foil laminate and clear polyester film which is interlaced with a galvanised steel wire (.041) having a 3/4” pitch.

The core is wrapped with fibreglass insulation certified “GREENGUARD” having a coefficient of R4.2/R8.4 and is encapsulated by a metalized vapour barrier reinforced with fibreglass string.