Product Description Material: rubber Size: 18.5cm Suitable for irobot Roomba i3 / i3 + / i4 / i4 + / 16 / i7 / i7 + / E5 / E6 / E7 etc. Quantity: 2pcs Package Content: 2 * Sweeper Accessories 1. Make sure your iRobot vacuum cleaner is providing optimum performance by replacing the disposable brush and spare filter every 2-3 months, depending on your frequency of use. 2. Easy to install to start cleaning again as quickly as possible. Simply remove the old filter from the main brush and the side brush and replace them with these spare parts. 3. Made of very durable and environmentally friendly material 4. INNOVATIVE DESIGN Double counter-rotating extractors incorporate a durable rubber tread design, which easily grab and break down dirt and debris from the smooth ground. 5. HIGH QUALITY & CLEAN EFFICIENCY Made from high strength and environmentally friendly material, removes hair or debris or particles and helps rid the air of dust and other particles.