Full 5″ x 5″-18′ Appearance Grade Alaskan Yellow Cedar. Appearance grade means small tight knots and a fair amount of clear, knot free wood. It is significantly stronger than red cedar or pressure treated lumber as well as more resistant to decay, insects and fungus. And although it costs just a bit more then pressure treated, it is attractive, contains no added chemicals and is a lot less expensive than western red cedar. Use as is for any outdoor use including decks, arbors, pergolas even in the dirt. Always check for available lengths.