Caption: Herky filter bags stay clean even after sucking up 5 pounds of ultra-fine chalk dust. Credit: Herky Filtersher Link to this video Email & IM: HTML Code: Video Information Headline: Herky filter vac bag gobbles up chalk dust Source: Herky Filtersher Release date: Wednesday Sep 19, 2012 Release time: 10:33 pm City:: Canfiled State:: Ohio Country:: United States of America [US]