Nikro exterior pipe & duct cleaning tool. For use with Nikro HEPA vacuums. NIKRO- A true innovator in H.E.P.A. filtration offers a complete line of critical filtered vacuums and vacuum accessories for use in removing asbestos, lead, toxic, and nuisance dusts or other applications were H.E.P.A. filtration is a must. For more information about NIKRO visit ourNIKRO Brand Page.