[1.5 in] I bought the adapter plate to mount on my existing Perrless wall mount that I bought 14 years ago. Fit great
Tv mounting bolts were too short
Called customer service and they shipped out the correct ones for my 65"

[3.5 in] Used as a security camera system monitor and gives a nice clean picture; refreshes cleanly. Light weight and slim size made wall mounting easy.

[200 x 100 mm] Easy to swap out with the original mount plate. Made it possible to use our older Peerless articulating arm wall mount with a new flat screen TV with a different rear bolt pattern from our 11 year old flat screen TV. This adapter plate saved us hundreds of dollars! Reasonably priced and B&H had the best price. Very fast free shipping, what more could you ask for? We could not be happier with this item, as I am with all of my B&H purchases.

[3.5 in] Solid adapter plate with hardware needed to mount PG42UQ to Ergotron HX Desk Monitor arm.

[200 x 100 mm] Very simple, one piece stamped metal product, powder coated in black. Includes security fasteners! I used mine to connect my 400 x 400 VESA monitor (which only weighs 30 lb) to a support with 100 x 100 VESA connections (holes for other VESA patterns are also drilled in the adapter). Very easy install - line up the holes, tighten the security screws with the included Allen wrench - done! (Picture shows adapter installed on TV, with 100 x 100 wall mount piece attached)

[3.5 in] Works perfectly. Easily rehung new television onto old PLA-1 articulating arm.

[3.5 in] I bought this part to attach to my 55 LG LED tv and mount the whole set up on a Peerless ceiling mount. This bracket was easy to attach and the whole set up extremely easy to mount. Price on B&H was much lower than directly from Peerless.

[3.5 in] Customer service was super helpful. I was nervous that this wouldn't include tools, but the allen keys were there and made for a super easy install. Product itself seemed super strong and high quality. Fast shipping too. Easy 5 stars.

[3.5 in] Had Peerless articulating arm for our 50plasma tv. Need adaptor plate for the new TV. Called Peerless for info on the plate we needed for our new LG tv. They provide the information and we purchased from B&H. Perfect fit.

[200 x 100 mm] For our office, we did not want to rip the existing arm out of the wall and replace it, so I went looking for an adapter. The arm was just 100x100 and the TV had a single 400x400 attachment. I did not find much. When I called B&H, this was the only option they mentioned. It seemed like manufacturers of these adapters are shy about putting huge TVs on small arms. (Nevermind that the huge new TV was actually lighter than the older smaller one. Such is the way of electronics.) Anyway, this was the only 100x100 to 400x400 VESA adapter we would find and it worked great. FYI Check your TV back first before ordering. If the TV back is not flat, you will need some spacers and longer bolts from Lowe's or Home Depot to get the brackets on. The adapter is obviously flat, and it's important that washers and spacers are used so that the bolts get into the TV without bending it.