Unlike the other kits, that are typically rebranded kits, that are all the same out of China, The Luxury Pergola is manufactured ourselves. We use the finest aluminum grade, the same material used for commercial applications. Other online pergola kits use a light weight aluminum. For example, the material kit used for our 10 x 13 pergola has a total weight of over 1000 lbs. Other pergola kits, of same size, have a total material weight of less than 250lbs.