General description Replacement Parts Dust Bag compatible with iRobot Roomba i7, E5, and E6 Robot Vacuum Cleaner. Made from high-strength, environmentally friendly material, these dust bags are designed for easy installation and optimal performance. It is recommended to replace the dust bag every 1-2 months for best results. Technical specifications Material: Cloth Package Contents: 10 x Dust Bags, 1 x Cleaning Brush Measurement allowed error: +/- 1-3 cm