Contains 2 x replacement bulbs and 3 x replacement discs. Poison-free - kills fleas with no sprays. Refills for use with Zero In® Flea Killer unit. A safe and effective way to rid your home of fleas without using poison sprays. Flea Killer Refill contains three refill discs and two spare lamps; safe and effective household treatment for flea problems without using poison sprays. 7 W replacement lamp bulb rated for 1,000 hours continuous use; change refill discs every 2-4 weeks. Flea killer refill sticky pads have easy-peel backing paper and stronghold glue. Poison and chemical-free, odourless refills for the control of flea infestations in the home. For use with Zero In Flea Killer (product code: ZER020).