Outside diameter is 5.56. Conduit is hot dip galvanized. It has been outside but protected from rain and has picked up minor surface rust on the threads. The threads are still sharp and unaffected by the small amount of rust. Each 10 ft piece comes with a 5 threaded coupling.The brand is Republic Conduit. The price comes out to about 50.00 per stick. Factory new price is over 200.00 per stick. Each bundle weighs 1980 lbs. We will work to get you the best rate possible. We have been in business for 20+ years. As with all my listings, your satisfaction is guaranteed. Check my store for more fittings or contact me for items not listed. The item "5 GALVANIZED RIGID CONDUIT FULL BUNDLE 150 FT 15 PCS X 10 FT" is in sale since Wednesday, November 21, 2018. This item is in the category "Business & Industrial\Electrical Equipment & Supplies\Wire, Cable & Conduit\Conduit, Fittings & Tubing\Conduit". The seller is "specialtyelectricsupply" and is located in Joliet, Illinois. This item can be shipped to United States.