6' planks. Harder than Moso bamboo. Harder than Oak. Nail-down installation. Standard sand and finish in place. Can be stained any color. Lifetime warranty against delamination. 3 1/2 x 72 x 5/8 Our vertical grain, solid, unfinished bamboo floors are installed exactly the same as a traditional solid Oak, Maple or type of hardwood flooring. It is nailed down and then sanded and finished in place. You can choose which type of finish you prefer. Square edges mean that after it completed, the finish surface should have no breaks. Unfinished bamboo floors also give you the freedom to custom stain the color to your exact preferences. Our tropical species of bamboo is harder than Moso bamboo. Always made out of mature canes for maximum hardness.