https://www.amazon.com/Noch-60135-Gras-Master-Applctr-Scale/dp/B00CMZ3WWE

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That is the one I purchased 5 years ago and it was like $68 now $100 more. I will say that i have covered some major territory with it, have been through 8 pounds of different static grass and it works fantastic and the attachments are nice. The one here mentioned to make at home is no where near as powerful as the one I purchased. Depends on what your trying to do but one can get great results with one of the puffer bottles.