Infinuvo Replacement Side Brush for Hovo 510 Series and Compatible Robotic Vacuums, 3 pack Infinuvo side brush for Hovo 510 and bObi robot vacuum models, If you need mounting screw, please buy it from ASIN B07KXB6J3M Side brush provides better coverage at corners & along edges, so vacuum picks up more dirt, dust and debris from your floor. Replace side brush regularly to keep the vacuum at peak performance Including 3 replacement side brushes as a set. If you need mounting screw, please buy it from ASIN B07KXB6J3M You can buy other bObi spare parts, please search for "Parts Accessories Hovo 510 bObi Robot Vacuum "