SENTRY(R) PurrScriptions(R) Dual-Action Flea & Tick Collar for Cats & Kittens The SENTRY(R) PurrScriptions(R) Dual-Action Flea & Tick Collar provides fast, long-lasting protection for up to six months for cats and kittens 6 months and older. Item Specifications: Size: Fits necks up to 14 wide Active Ingredients: Geraniol: 1.22% Cinnamon Leaf Oil: 5.45% Lemongrass Oil: 5.45% Clove Oil: 5.05% Other Ingredients (Nylon, Propylene Carbonate, Zinc Stearate): 82.83% Total: 100.00% 3282 73091032823