Features: The imported Bayer seal strip used is endurable and deformation-free with great air tightness to offer an excellent floor-clinging effect for better sweeping. The cushion pad is installed where the brush touches the ground, preventing against scratches on the wooden floor.The impact-resistant main body is made of rugged high-strength polycarbonate, and the mold is injected with 304 stainless steel to form anti-wrap steel wire, perfectly preventing the power cable from being wrapped into the main brush.The main brush comes with a buckle for easy installation and cleaning with one single hand.The main brush's bearing cover is designed to have multiple bends at the air duct gap which can block and accommodate the hairs. Specification: Condition: 100% Brand New Main Material: ABS Effective range: 51-100 Color: As Picture Shown Fitment: For Xiaomi Roborock Robot S50 S51 Package List: 1 * Main Brush Cover Replacement