You will cut through the black border of the iMac and end up with what look like scratches under the screen when you use the iMac.I also had to install all of these onto the screen instead of onto the computer, as recommended to install both sides and the top adhesive tape.
I did this because the nice plastic backing material didn't pull off if I installed them onto the computer as recommended.Basically, I got it to work, but it didn't work well for my iMac 2015 in 27" nearly as well as good quality tape made for my computer.
The filament on this product was great, the pieces lined up perfectly, but it was not possible to separate the bottom plastic layer on those two sections.
The thick areas are the areas like the WIFI/Bluetooth surface on the right side, near the camera on the top, etc.To makes sure the adhesive stays, I made sure I pressed hard on the edges after installation and even afterwards I used tape to wrap the top and sides for about two weeks to make sure the screen won't fall out.
For $10 it was worth it.
I bought two separate kits - both failed and my 27-inch A1419 screen fell off.
We spent considerable time doing this job right.These strips are cheap and the adhesive does not stick.
If the seller is reading this, please reach out to me, I'd like to a refund on both strip kits and money toward buying a new screen fro my Mac.
We purchased this item and it was installed it on a 27" IMAC.
If the LCD would have hit her desk, it would have not only broke the display, the cabling would have pulled the motherboard right out of the computer.Not recommending this item at all!