Clear - A flooring product selected for its dark rich coloration and minimal character marks. The face is 100% true heartwood coloration. Will admit small tight knot up to ¼" every 3'; small tight checks; a minimal number of slight edge defects (indentations); small burls and fine unstained pinworm holes or a thin brown streak 3" in 2'. Select - A flooring product with natural coloration variations found in heartwood and steamed dark sapwood. The steamed sapwood should not show a prominent color contrast to the heartwood. Will admit the following: broken knots up to 3/8" with no loose pieces; narrow slightly open checks; edge defects (indentations) up to 2/32" x ½" in aggregate for every 2'; pin worm holes 2 per foot and/or 2 flag worm holes per 8'. No. 1 Common - A flooring product, which may contain prominent color variation between the light sapwood and dark heartwood, along with prominent natural and machine, produced characters. Will admit knots, worm holes, bird pecs, sapwood may be stained, blotchy or speckled. No. 2 Common - A flooring product, which contains sound, natural variations and manufacturing imperfections of the forest product. All imperfections and open characters must be fillable. Will admit knots and knot holes where openings do not extend through piece; edge defect ¼" x ¼" if irregular and will hold filler - not to extend through tongue and groove; prominent open checks not extending through piece; unlimited sapwood.