1 in. x 10 ft. Electric Metallic Tube (EMT) Conduit

Coat this as you would any other galvanized surface. Be sure to 'de-grease' and remove residual oil used in the manufacturing processes. Apply a primer specifically formulated for galvanized surfaces. Most sources recommend an acrylic topcoat. Select one for indoor or outdoor exposure where you are displaying the flag. Each of these products is available at Home Depot.

I cut my own but in the past, I have had them cut plywood for me. Ask before you buy or buy a metal cutting saw.

A bundle is comprised of 10 lengths [or 100 feet]. A Master Bundle (or "lift") is comprised of 300 lengths (30 bundles) [or 3000 feet].

Cost is per piece.

Yes! They cut mine so I could get them in my car.

Our local store cut the conduit for me, so I’d venture that your location will also.

Trade size is the nominal inside dimension. According to the Steel Tube Institute, nominal O.D. is 1.163 inches and nominal wall thickness is 0.057 inch. (Computation yields 1.049 inches nominal I.D.)

Online orders cannot be cut to length; but Home Depot employees are trained to cut the tubing in the store if you purchase it there.

I use it for non electrical purposes, the connections are not waterproof. I have had it exposed to the non-salt air elements for years with no known adverse effects. Salt air may cause it o corrode over the years.

Not sure. They do sell it by the foot, but i always buy full pieces and cut it myself.