These parts are leftover from my 2 Trauma gas htr installs. Enough duct and outlets for a second outlet ( which is extra cost) if you are contemplating installing a heater or need the extra outlet, ( extra outlet kit is $215 ) the long outlet tube is about 2.9 m long. There are Inlet air vents and adapters, adjustable outlet vents, short exhaust ducts, clamps etc.

Cleaning my shed out so if you want them let's say $35 posted to you.

Chris.