High density heart pine. Minimum knots, less than 1/2" mostly clear.
No stain, square edge before machining. Heavy, usually over 3# bdft, most pine is 2#. Tongue and groove long edges, filled, sanded. 5"x 48", 72", & 96" long. Ready to site finish with no further sanding. You may have to spot fill and spot sand, if you find any small defects you find objectionable.