The attractive circular styling of this 4 way locking flap is popular for wooden panel doors in addition to glass and acrylic. It is particularly recommended for single/multiple glazing.
* For existing toughened/multiple glazing, a new panel will be required
*Petmate is changing its name to Closer Pets
Cut out size - Diameter 223mm
Overall size - Diameter 245mm
Works as it should, and relatively easy to fit, BUT - if you are fitting it to glass you will need a hacksaw or similar cutting tool to trim down the inner side of one half of the cat door first; it can be fitted by one person, but far easier to do with two, and; before fitting, put the two sides together, lay the door flat and screw the screws in and out once first - makes screwing the two sides together once in place much easier.
The second one I've purchased in the last seven years a really durable and reliable cat door.
Great thanks