Dog Flea/Tick Collar

Sentry, Dual Action Dog Flea & Tick Collar, Kills Fleas & Ticks For Up To 6 Months, Fast Acting, Kills Up To 98% Of Ticks Within 24 Hours, Long Lasting Protection, Injected Molded Collar With Notches To Fit The Collar Securely To Your Pet Up To 24.5".