Features: Suitable for S50 S51 S55. Exquisite and delicate, highly matched with the original equipment. Made of metal materials, Solid and durable, long service life. This motor is used with the distance sensor. Includes orange pulley for easy replacement. The motor works well and is stable, helping the sweeper to achieve better and faster cleaning results. Specifications: Material: Metal, Plastic Color: As Shown Types: With Pulley, No Pulley Power: DC Voltage: 6V Torque: 60Gcm Starting current: 0.35A Maximum efficiency current: 70mA Maximum efficiency speed: 2200 rpm Maximum efficiency torque: 10g. cm Size: about 4.5*3.5*3cm Package Included: 1 PC x Motor (with small orange pulley or No Pulley) Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement. This product will be an excellent pick for you.