Would this fit on a 1.75 inch thick door?

Hi, It will fit well if the door is 1.25" to 1.75" thick. Hope this helps and have a great day! Best,

What about the back side? So annoying not to have that info readily available.

Both this and their other model has a back frame, which you install first. No pictures for some odd reason but it exists. Back piece uses small screws too. Much more secure than tape.

Weight Limit	20 Pounds
Frame Material	Plastic
UPC	860007666254
Manufacturer	Purrfect Portal
Country of Origin	USA
Item model number	French_Door
Product Dimensions	10.16 x 18.11 x 21.13 cm; 801 g
ASIN	B0BJ7KGNL6

Purrfect Portal French® Cat Door - Stylish No-Flap Cat Door Interior Door for Average-Sized Cats Up to 20 lbs, Easy DIY Setup, Secured Installation in Minutes, No Training Needed, 7.13 x 8.32”

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