Bentwood knot sculpture raw material for cold bending in your choice of species: white oak, red oak, ash, grey elm, red elm. Please specify species if desired in your order notes. Each knot is made from a single piece of solid hardwood about 3/8" x 1 1/4" x 48" long. This kit contains enough material to make 5 knot sculptures. You can of course make any knot style you wish, but we will link you to a video to show you our knot bending method. Want to bent 10 knots? Order quantity 2 and we will reverse the shipping charges.