Doors and frames come in five sizes to accommodate the smallest cats to the largest dogs. The bronzed Lexan door slides up and down within its own frame. Remember, for larger dogs, install the door 4" - 8" off the ground so the dog may easily step through. The frame is 4" thick.
IMPORTANT POINT TO CONSIDER WHEN ORDERING A SOLO PET DOOR: When your pet is young and agile, it is easy for it to maneuver through a small opening. An important issue to consider is that, as they get older, dogs in particular can get arthritis in the back legs and hips. The Solo pet door will last for many, many years. As your pet ages, a slightly larger door with more head room and installed lower to the ground will make it easier for it to enter and exit through the door!
