604024 NaceCare NVM 4BM Micro Flo bags to use with NDD 900 (5 per package)   

MicroFlo- is for the full range of fine dust applications 

IMPORTANT NOTE! 
Dusrcare machines equipped with MicroFlo bangs can be TOO GOOD, resulting in overfilling. In applications such as chimney sweeping ot woodworking where ultra fine dust is not the main problem, use HepaFlo bags in place of MicroFlo.