The STIHL 48127105904 Cutting Unit Set 7 is an original equipment manufacturer (OEM) replacement part designed specifically for STIHL iMow robotic lawn mower models. This essential maintenance kit includes 9 durable steel blades, typically arranged as three sets of three, ensuring a consistently clean and efficient cut. Regular replacement of the cutting unit is crucial for maintaining optimal mowing performance and extending the lifespan of your iMow robotic mower. It is compatible with models such as RMI 422, RMI 632, RMI 632 P, and RMI 632 PC, providing a perfect fit and reliable operation.