Do not confuse it with other similar models. Roof Size: Small Roof: 36 inch. Big Roof: 129 inch. Premium Material: full canopy cover adopt newest secure materials, more wear-resistant and tear resistant. Can withstand 1800mm water pressure, so that the canopy cover have better water resistance. PU coated is good at sunproof, anti-Uv, keeps cool in hot day, suitable for all season. Includes: One replacement top ONLY, Metal Structure NOT included.