The only two-way dog door on the market with "special" heavy-duty spring loaded hinges that provide a positive weather seal! When your dog goes "out" the door, the inner clear plexiglass panel and the outer welded aluminum frame move. When your dog goes in the door, the welded aluminum outer frame stays stationary and only the inner clear plexiglass panel moves. Chew Proof/ lndestructible Developed by a Gun Dog Kennel owner/retriever trainer, Black lab tested for more than 20 years. Energy Conservation/Insect Protection.
This door closes tighter than all other kennel doors due to the heavy duty spring hinges specially designed for commercial use and abuse.