Thermoid - Aeroduct Black 2-1/2" Steel Wire Reinforced Air Duct | CAT10
Thermoid CAT Aeroduct Ducting is a lightweight and versatile ducting made of a single ply black neoprene-impregnated fiberglass with a spiral copper coated steel wire inside and wrapped with fiberglass cord on the outside.
Featuress: Extremely lightweight and highly flexible. Short lengths can be joined together to form a continuous length.
Usage: This ducting is not recommended for high abrasive materials, liquids, or negative pressure applications.
Heard about Boelube for years. Finally had a chance to try it on several projects. It definitely works well and better than anything else I have ever tried. Would recommend.