Red Hills Lumber Southern Yellow Pine comes from a mix of SYP species. The Prime grade is very clean material, and while a little wider grain on average than our longleaf, still much better than most SYP on the market today - the sort of wood everyone used to be able to get from their local lumberyard in the 1940's through 1980's, but which is increasing difficult to find today. Available in PRIME grade (very clean), as well as a variety of knotty grades.