Infinuvo Enhanced Pet & Allergy Filter for Hovo 510 Series Robot Vacuum, 3 Pack, Black Infinuvo Carbon Activated Filters - replacement filter for Hovo 510 & Hovo 510 Plus robot vacuum cleaner. Remove contaminants using chemical absorption, traps more dust and allergens than the standard filter. Great for pet owners and people who suffer allergies. 3 filters per pack, replace filter regularly to keep the vacuum at peak performance! COMPATIBLE MODELS: Hovo 510 by Infinuvo, Bobi Classic by Bobsweep, Bobi Pet, Hoover Quest 1000 NOT COMPATIBLE MODELS: Bobsweep Standard, Bobsweep Pethair