This pet door is called the MaxSeal Door Mount, which is produced by Security Boss Manufacturing. It produces the best insulation in comparison to any pet door on the market and in the long run it will pay for itself in energy savings. The innovative flaps are weatherized, which helps maintain the shape and flexibility in hot and cold climates and is UV treated deterring any discoloring or cracking in direct sunlight. Stainless steel strike plates are riveted along both sides and the base of the flap, which connect to high powered almiko magnets embedded in the frame. The almiko magnets are stronger then most magnets offered in pet doors. Pile brush material lines the perimeter of the flap when closed eliminating any drafts or air leakage. The insulated security panel that is included with every MaxSeal is the only one of its kind on the market and when in place with the industrial grade pin lock is nearly intruder proof. This pet door is entirely built with rust resistant components and its heavy duty frame is the strongest in the pet door industry.