We installed another heavy duty white dog door in Simi Valley today for repeating customer. The pet door was a large size which was enough for the dog they had. The construction is all extruded aluminum and has powder coating color finish that goes very well e en with the newest and nicest doors. By design. We carry the finest dog doors on the market and guarantee the for life so if you are in the market for a dog door in simi vley or any near by city c us and we will come to you with a sample door and give you a free estimate. 805 304-6778