The Ideal Replacement Cat Flap is used for the Ideal 4-Way Locking Cat Door. It is made of Lexan Polycarbonate, which is great for temperate weather conditions. These come in two different sizes, Cat Flap and Large Cat flap and both are a clear rigid poly-carbonate.
The Ideal 'E' Cat pet door is found in door mount as well as patio panel and sash versions. It is an electromagnetic door requiring a collar key for operation. The flap dimension is 7" w x 9" h making it quite large for a 'cat' type flap. The red 4-way lock is a notable feature.