Replacement cartridges for the Portable Mosquito Killer Unit. Each refill pack includes 5 cartridges, each designed to last for approximately 6 nights. Contents: 5 cartridges Treats: Approx. 30m3 Active ingredient: Transfluthrin Effective for: Approx 6 nights (per cartridge) Kills - Biting insects when used with compatible portable unit. Use for - Large tents, huts and hotels with compatible portable unit. Portable Killer Unit available separately Weight: 0.05g Dimensions (unpacked): 65 / 35 / 0.5 mm