Home / Ducting / Ductmaster Thermal - Rectangular / Thermal Flat Channel 1M Length Thermal Flat Channel 1M Length £19.20 – £22.44 DUCTMASTER THERMAL insulated duct 1m length. Available in 2 sizes Size Choose an option204x60mm220x90mm Clear Thermal Flat Channel 1M Length quantity Add to basket SKU: N/A Categories: Ducting, Ductmaster Thermal - Rectangular Tag: Thermal Ducting Product ID: 10509