The Dreame RSB9 is a replacement side brush designed to help your robot vacuum effectively sweep dust and debris from edges and corners toward the main suction path. Made from durable black nylon, these brushes are built to handle daily cleaning tasks while maintaining their shape and efficiency. This set includes two brushes, making it easy to keep a spare on hand for when the original wears down. They are compatible with a wide range of models, including the D9 Plus, L10s series (Plus, Pro, Pro Ultra, Pro Gen2, and Ultra Gen 2), L20 Ultra and L20 Ultra Complete, L30 Ultra and L30 Pro Ultra, as well as the X30 Ultra and X30 Master.