I have bought the same model as this last year from another vendor, but I think that the product comes from the same manufacturer, very difficult to mount, yet I tinker a lot, the result is shabby, the polycarbonate panels flew one after the other because the clips are totally effective and result of the last gale in March I found a part of the greenhouse in the field of my neighbor, yet anchored in a row of blocks on the ground, Purchase absolutely inadvisable.