General description Replacement Main Brush, Side Brush, and HEPA Filter set designed for iRobot Roomba I3, I3+, I4, I4+, I7, I7+, E5, and E6 vacuum cleaners. Made from high-strength, environmentally friendly materials, this set ensures optimal cleaning performance while reducing the penetration of dust, pollen, and other allergens into the air. Technical specifications Material: Plastic Package Contents: 4 x Rolling Brush 10 x Side Brushes 10 x HEPA Filters Measurement allowed error: +/- 1-3 cm Usage It is recommended to replace the brushes and filters every 1 to 2 months to maintain the vacuum cleaner's performance.