Duogreen Replacement Side Brush for iRobot Roomba Roomba 400 Series, iRobot Dirt Dog, and Discovery 3Pack Duogreen replacement side brush for irobot roomba 400 series, irobot dirt dog, and discovery models Compatible with irobot roomba 400 series, irobot dirt dog, and discovery models Part#11239 includes three side brushes and three screws Series : 4270 4280 4290 4300 4310 4320 4210 4220 4230 4240 4250 4260 4905 400 410 419 400 405 410 415 416 418 4000 4905 4100 4110 4120 4125 4130 4210 4220 4225 4230 4110 4225 4910 4330 4225 4226 4227 4228 4229 Series : 4231 4232 4233 4234 4235 4236 4130 4260 4270 4290 4150 400 405 410 415 416 418 4000 490 4200 4210 4230 4240 4250 4260 4390 4400 4410 4420 4430 4440 4160 4170 4180 4190