SilverStone Technology SST-FF123B 120mm Ultra Fine Fan Filter with Magnet Cooling

By placing a computer dust filter over an intake, you reduce the risk of dust related PC illnesses, such as overheating, system failure, and permanent data loss. Using PuraPC's washable computer air filter system can prevent these ailments. This dust filter material helps stop dust from entering any PC or server without any increase in temperature. The computer air filter material is installed over intake fans and vents as to not restrict the exhaust. Filters should not be placed over an exhaust, as this traps heat, and dust doesn't enter your computer this way. The cool air that is drawn into your PC through intake vents and fans is how dust enters the computer.

1 sq ft 60 pores per inch (ppi) polyurethane foam
Can be cut to fit any shape(s) and size intake(s).
Different mounting options of inside or outside the computer case to retain form and function.
Minimal airflow resistance and collects all kinds of dust and dirt - pollen, pet dander, lint, etc.
Washable; just rinse under tap water.
1 sq ft 60 pores per inch (ppi) polyurethane foam
Can be cut to fit any shape(s) and size intake(s).
Different mounting options of inside or outside the computer case to retain form and function.
Minimal airflow resistance and collects all kinds of dust and dirt - pollen, pet dander, lint, etc.
Washable; just rinse under tap water.

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Pura PC Computer Air Filter - Polyurethane Foam Filter;