Spare ducting available in 60mm, 75mm and 90mm.

4kw Autoterm Heaters require 90mm ducting.
Most "Chinese" Heaters require 75mm ducting.
2kw Autoterm Heaters require 60mm ducting.

Sold by the meter - it will be delivered compressed (0.75m) but will extend to 1m.
For 60 and 90mm ducting, enter the required length in meters into quantity. (E.G. Quantity 4 = 4m)
For 75mm ducting, if you order 4, it will come as 4x1m lengths.