Anti-flea, topical treatment for animal care, cats and kittens against fleas, 3 months treatment. Onespot Ultra Guard Hartz. 3 tubes of 1ml each. Control OneSpot Hartz, (for cat and kitten). Format: 3 tubes of 1ml each Duration of treatment 3 months. descriptions: - Kills flea eggs before they hatch. - Specially formulated for cats and kittens. - Topical treatment against fleas, simple and practical to use. - With vlGRen insect growth regulator.