Red Oak (Quercus rubra), relative hardness – 1,290, thickness: – 3/4″ (Solid or Engineered Elite Plus) or 1/2″ (Engineered Elite – ONLY IN 5″ WIDTH). Widths available: Solid – 2-1/4″, 3-1/4″, 4-1/4″ & 5″; Engineered Elite – 5″; Engineered Elite Plus – 5″ & 7″. Grades available: Solid – Builder, Canadian plus, Cottage, Natural, Select & Better; Engineered – Cottage or Select & Better. Sheen – Glossy, Matte, Satin or Semi-Gloss.