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 Please note: the physical slightly color difference or difference, number or different, but does not affect the use, please do not mind, thank you! Material: fiber cotton colour: Blue Package Contents: 3 x Airbrush Booth Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.