General description Replacement roller brush for the LA400/VD550 wireless vacuum cleaner. This part is designed to ensure optimal performance of your robot vacuum. Please check the model number of your robot vacuum before purchasing to avoid buying an unsuitable main brush. Technical specifications Type: Vacuum Cleaner Parts Color: Blue Material: Plastic Dimensions: Measurement allowed error is +/- 1-3cm Usage To maintain your robot vacuum in the best cleaning condition, it is recommended to replace the roller brush every 3-6 months. The main brush features thick nylon bristles that effectively remove 99.97% of debris from the floor. Other information The package includes 1 main brush. Note that light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.