General description Replacement Main Brush, Side Brush, and HEPA Filter set designed for iRobot Roomba I7, I7+, I3, I3+, I4, E5, E6, and E7 vacuum cleaners. Made from high-strength, environmentally friendly materials, these accessories are easy to install and help maintain 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 6 x Side Brushes 6 x Filters 8 x Dust Bags Measurement allowed error: +/- 1-3 cm Usage It is recommended to replace the brushes and filters every 1 to 2 months to ensure the vacuum cleaner operates at peak performance.