FleaVac Flea Kill Pellets were designed to utilize well established natural oils that have been used to kill fleas combined with natural bentonite as a holding agent to deliver these natural oils to the fleas. The effect is a lethal combination to fleas. Kill pellets can be used with the FleaVac (sold separately) to kill fleas on your pet or used in a vacuum to kill household fleas. FleaVac Flea Kill Pellets kill all four stages of fleas including adult fleas, eggs, larvae, and pupae. The kill pellets contain no harsh chemicals or pesticides. They are product that is made up of all natural ingredients including; natural clay, geranial, cedar wood oil, mint oit, along with our proprietary blend of other natural ingredients. When Kill Pellets are added to your vacuum chamber, your vacuum becomes a safer, healthier, flea exterminator. Simply vacuum Kill Pellets up and start killing household and pet fleas immediately. Kill Pellets remain effective until it is time to empty your vacuum chamber or change the bag.