RE: Doggie Doors Contact this manufacturer-They Sell Direct!!! Excellent quality, and stand up to BIG DOGS!!! A lot of kennels in our area, have these in use for many years. Also seems to be the safest door we've found. Nothing for the dog to get caught on or in. Pet Doors USA 800-749-9609 Dept DF897 4523 30th Street W. Bradenton FL 34207-1072