Package quantity: the quantity can meet your multiple needs. Compatible with: replace filter is compatible with for booth models B400DC and B420DCK, fit for paint booth draft and down draft exhaust system; Please check the model before purchasing Easy to clean and store: this booth filter pad is easy to clean, after using, you can clean it and store for next time use, which is to support a period of time use and you don't need to change frequently Practical tool: you can apply paint booth filter on your airbrush booth, in this way the filter can provide overspray holding capacity, catch paint particulates, to keep the air in your home safe and breathable, well meet your needs, Weight: 0.18188136615 Pounds, Manufacturer: Wernfale