Hello, I have received a frame and a screen, you assemble the frame (aluminium) and then clamp the screen (simple assembly) but only in pairs. However, I have noticed after the assembly that in the middle of the screen a strip ( about 5 cm wide ) runs horizontally. is disturbing. probably error in the manufacture, but I must contact the, I have respect to clean this. Otherwise, I am very positively enthusiastic about the quality and operation of the device. Picture is razor sharp and colours are awesome. I can only recommend this one.

Hello, I don't know, it's a screen that you assemble yourself, it's simple and the result is great.
Bonne journée