anyone familiar with these fans?

so i Google "quiet 6 inch inline fan", and this little gem pops up, for a great price. anyone familiar? it boast ta 500range cfm, but is it constant or variable? are these quiet?



http://www.ventingdirect.com/soler-and-palau-td-200-8-200mm-inline-mixed-flow-duct-fan/p934769

you can get a really good in-line 6" fan from Home Depot for around $35 or the 8" for around $45

those fans are great i have the 6" its about as quiet as a can maybe a bit quieter. really moves the air tho

appreciate the response farfenugen, but im actually looking for an inline fan not a booster fan.

I"ve read good things about mixed flow inline fans that model being one of the far more popular ones. Alittle more pricey than the equivalent regular inline fan. I also read that they are relatively quiet *shrugs* I don't have one so hard to say. I use a 6 in Vortex in my flowering cabinet and couldn't be happier

Farfenugen- Have to check if they carry those at the store in your local area. There isn't a call for a booster fans in my area so neither of the big box store carry them on the shelves.