Honey994 months ago000Hello, can I install the cat flap in the glass without an adapter?Show in original language (German)Mishelly4 months ago • purchased this product000purchased this product Helpful answerNo, that's not possible, then it's not "tight". You then have no way of clamping, each disc is different in thickness, so you are free with the adapter plate.Show in original language (German)Comment1 commentAnonymous4 months ago • purchased this product000purchased this productNo. Mishelly's answer describes the problems.Show in original language (German)Comment