NOFMA Select & Better Red Oak	NOFMA # 1Common Red Oak
NOFMA No. 2 Common Red Oak	# 3 Common Oak

Appearance alone determines the grade of each hardwood flooring piece all grades are equally strong and serviceable in any application.  Flooring generally free of eye catching blemishes is known as "Clear",  though it still may contain burls, streaks and pinworm holes.  "Select" is almost clear, but this grade contains more of the natural color variations and characteristics such as knots and other marks.  The Common grades, #1 and #2, have more markings than either of the other two grades and are often specified because of these widely varied natural features and the "strong" character they bring to floors.  You know you're getting a consistent product because NOFMA members' grades are certified.