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Anonymous users2024-01-24You take off the cat's eye, take a ruler and measure the diameter, and then buy the same one. Generally, security doors are universal, and remember to measure the thickness of your door leaf is a few centimeters.
You can go to a store that specializes in selling doors or a hardware store.
Concave mirrors.
Because, the role of the cat's eye is to use a smaller hole to see a larger range, the flat mirror does not have this effect, and the convex lens will produce a magnifying effect, the image is large, the range is also large, where you can't see a larger range, only the concave mirror has a narrowing effect, the image is small, and the range of seeing is also large. >>>More
180 degrees is easy to find, just use the hinge hinge. There are all those who sell hardware.
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This one is outdated... This should be called a video doorbell... If you go and buy it, tell them so ... The doorbell on the cat's eye can be opened and slid to the side... You should know that.