Economical extractor with a nice appearance. The diameter of the hole is 9 cm, not 12 as stated. 12 cm is the external dimension of the collar base, so we had to improvise by using the old collar externally and silicone to attach it to the old pipe. It is quite noisy on the third setting. When using the front burners of the kitchen, it always requires the third setting to prevent steam from escaping outside. I wouldn't say it's an amazing value for money, but for 50 euros, I think it's okay.