B pillar door insulation

Have you seen one of these ? I saw them once before and it doesn't come cheap many years ago. Previously it was advertise manufacture by Korean but now the chinese produce them too, and it is cheap.
Hence I decided to buy one to try it on the car. Price is so affordable, but when I received it, it was a bit shorter than I think. 80cm for both strips instead of 80cm for 1 strip. However it is adequate for Isis. The sliding door on the Isis have good insulation on the left hand side panoramic door so the strips are good for 1 door.
I had install it on the car, 1 strip for the top and 2nd on the bottom, the curve on the middle part of the door seems trick to install as the strip doesn't bend well. After installing, there are a small gap of 1cm between both, but I am ok with it.

The cross section of the strip are as below. Inside is a metal clip to keep it in place on the door position. No glue or sticker are required, I prefer it that way.

Now what left is the road test to see will it block some wind noise. I will update soon on the result.
If you wanted to buy one, just search for B pillar insulation from any online store. Small sum for some easy DIY.