Bayer Animal Health Seresto Flea Tick 7-8 Month Collar for Small Dogs up To 18lbs BAYER's Seresto for Small Dogs Flea & Tick Collar ( under 18 lbs, 15 inch or less ) *includes reflectors For 8-month prevention and treatment of ticks and fleas on small dogs and puppies 7 weeks of age and older and under 18 lbs (8kg) USA EPA Approved : EPA REG Number: 11556-155 ; EPA Est. Number: 90297-NC-001