Oak (Quercus spp.), relative hardness – 1360, thickness: – 3/4″ (Elite) or 9/16″ (Clic), width: 5 7/8″, lengths: 25% full boards 73″ (Elite)/75% full boards (Clic), finish – 10-layers Ultramax A. O., limited 35-year finish warranty, lifetime structural warranty. Installation – tongue and groove (Elite)/Uniclic w/ Push Lock ends (Clic).