Genuine Pulsebac Filters 
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H-13 HEPA Rated twist on/off filters made of a spun bond polyester media with a P.T.F.E coating
Fits 1000 Series Vacuums Easy to replace just screw on and off
Only available for the Pulse-Bac Dust Collection Units
Great for 1050, 1150, 1250, 2150(Pro 176,225 and 311) Vacuums
More durable than any filter on the market today
Made of a Spun Bond Polyester that is long lasting with a wax type coating+