This is for my FPV transmitter and as not many companies make this specific size I decided to give it a try. It's good quality and the glue seems pretty strong. The cells are a bit too small than I would like, but I also use a fan so I'm not worried. Edit: Wow, those heatsinks are amazing. Normally my FPV transmitter gets REALLY hot when I run it at max power and after installing one of these heatsinks my transmitter was icy like it wasn't even powered on. Of course I also run it with a fan, but it still gets a bit warm with a fan. I highly recommend it!