Redkey Pre-Filter for F10 Cordless Folding Stick VacuumsDescription The Redkey Pre Filter is designed specifically for use with the F10 Cordless Folding Stick Vacuums. It effectively captures and traps dust, dirt, and other particles, ensuring that the vacuum cleaner operates at peak performance. Regularly replacing the pre filter helps maintain the suction power and overall efficiency of the vacuum, providing a clean and healthy environment for your home or workspace.