25" Preventic Tick Collar for Dogs - Contains 9.0% Amitraz

PREVENTIC collars prevent the attachment of ticks for 3 months, and detach existing ticks before they can transfer disease-causing organisms. Contains 9% amitraz and is recommended for use on dogs 12 weeks and older. Not labeled for use on cats. Prevents the attachment of ticks for 3 months, and detaches existing ticks before they can transfer disease-causing organisms. The 18" size is labeled for dogs that weigh less than 60 pounds, while the 25" size is labeled for dogs that weigh more than 60 pounds.