Roborock S4 Max Replacement Parts. Roborock S4 vs S4 Max Cordless Vacuum Guide Roborock's intelligent robot vacuum cleaner and mop make house cleaning easy and high-efficiency Replacement Spare Parts Compatible with Roborock E4, E5, S4, S4 Max, S5, S5 Max, S6, S6 MaxV Robotic Vacuum Cleaner Backup Kit with 1 Roller 4 Side Spin Brush 4 Hepa.
roborock Main Brush Replacement of C1, E2, E3, E4, S4, S5 from www.amazon.com
Replacement Part for Eufy RoboVac 11S Max, RoboVac 15C Max, RoboVac 30C Max RoboVac G30 Edge G10 Hybrid Robot Vacuum. The older S5 has slightly different side brush and roller brush so I would not recommend to but parts from this model (except filter which is the same for all models).
roborock Main Brush Replacement of C1, E2, E3, E4, S4, S5
Another user suggested Ali Express but almost everything I'm finding on there says it's compatible with S4, S5, S5 Max, S6 etc Amazon.com: 16 Packs Replacement Parts Compatible for Roborock S6 Pure, S6, E4, S4 Max, S6 MaxV, S5, S5 Max, S4, E20 E25 E35 S50 Xiaomi Mijia Robot Vacuum, 2 Main Brush, 4 Filters, 6 Side Brushes, 4 Mop Cloth : Home & Kitchen Roborock Q8 Max Series; Roborock Q7 Max Series; Roborock Q5 Pro Series; Roborock Q5 Max+; Roborock Q5 DuoRoller+; Roborock Q5 Series; Roborock F25.
Replacement Accessories Kit Compatible with Roborock E25 E4. Amazon.com: Replacement Spare Parts Compatible with Roborock E4, E5, S4, S4 Max, S5, S5 Max, S6, S6 MaxV Robotic Vacuum Cleaner Backup Kit with 1 Roller 4 Side Spin Brush 4 Hepa Filter Attachments NOT for Q5 : Home & Kitchen Just got the S4 Max, it's running it's first map right now
Replacement Accessories Kit Compatible with Roborock E25 E4. Compatible Devices Roborock S4, S4 Max, S5, S5 Max, S6, S6 Pure, S6 MaxV, E4 Series, E5 Series Roborock's intelligent robot vacuum cleaner and mop make house cleaning easy and high-efficiency