Features: 1) Acid free sizing, primary suitable for oil and acrylic painting 2) Style: nails on side, staples on side, staples on back, nails on side and staples on back, staples free 3) Material: bleached and natural pure cotton canvas with different weight, pure linen, line mixed with cotton, and polyester mixed with linen 4) Wooden frame, different thickness and shapes are available 5) Shape: quadrangle, round, oval, triangle, hexagon 6) Size: 30 x 40cm 7) With thread Outer packing: 20pcs/ctn