The Mounting Adaptor is made of two parts:one for the inside and one for the outside, making it possible to install the SureFlap microchip cat door into openings between210and 260mm in diameter(for the standard-sized model), or between294 and320 mm in diameter (for the large adapter). The total diameter is285 mm for the standard model and 380 mm for the large model. Cat Flap Mounting Adaptors are required to install the SureFlap Microchip Cat Flap, the DualScan Microchip Cat Flap or the Sureflap Microchip Pet Door into glass, walls and certain door types.These mounting adaptors from Sure Petcare allow installation of the SureFlap Microchip Cat Flap, the DualScan Microchip Cat Flap or the Sureflap Microchip Pet Door in a window or wall, allowing the pet doors to be mounted in circular holes.

Sometimes the installation adapter can be useful when installing the SureFlap cat door into a wall.