The distance between the arcs is 67 cm. Mounted on a 50x150mm beam. The location of the 40mmX20mm edge of the arches increases their strength 1.5 times.7 reinforced gears 40mmX20mm. Comfortable metal double-sided handle. Unique patented hinges open the door 180 degrees. Unique patented crab connections for easy and reliable attachment. Special protective cover for pipes, which extends the service life of the frame by 5 years. Memorable tips. The dimensions of the packed greenhouse allow it to be transported in a car. There are no welds. Special holes are made for convenient and accurate assembly of all parts of all fasteners.