Infinuvo Hovo 510 Replacement Filter, 3 Pack, White. Works for Hovo 510 series and other compatible robotic vacuums (Bobsweep Bobi Classic by Bobsweep, Bobi Pet, Hoover Quest 100). When filter is clogged or damaged, the vacuum will loose suction and pick up less dust and debris from the floor. Replace the filter every 3 months to keep your vacuum at peak performance! You can buy black color filter from ASIN B00HNYQDIO NOTE: Before placing your order, make sure to check the bottom view photo of compatible vaccums on the left, so you get the correct filter. NOT COMPATIBLE MODELS: Bobsweep Standard, Bobsweep Pethair