Zodiac Flea and Tick Collar for Large Dogs and Puppies with necks up to 25 Inch. Kills and repels fleas and ticks.

Starts killing and repelling fleas and tick on contact for up to 7 months
Effective, long lasting flea and tick control
Sustainable continuous release
Odorless, non-greasy, easy to use prevention
Adjustable, water resistant collar