Zodiac FleaTrol Flea and Tick Collar for Large Dogs 5 month protection

Zodiac FleaTrol Flea and Tick Collar for Large Dogs necks up to 25 inches 5 month protection
Offers your dog or puppy over 12 weeks of age up to 5 months of protection from adult fleas and ticks. Continuous action begins the moment the collar is applied and continues even when wet. A variety of sizes ensure proper flea and tick control. Measure circumference at base of dog's neck. Active ingredient: Propoxur.