This material was salvaged from 1950's New Orleans Riverfront warehouse. It was roof decking and has old paint on one side and light roofing tar on the other. It is approx. 1-1/2" thick and 4-1/2" between tongue and groove. . Lengths: random, 2' & longer; specific lengths are available for an extra charge. The tongue and grooves could be broken and/or mismatched. It is not Longleaf Pine, but is considered Southern Yellow Pine.