Seresto Flea And Tick Collar For Dogs, Suitable For Dogs Over 18 Pounds Is9ECWWgT,

Large: dogs over 18 pounds.
Find the right collar for your dog
Use your dog’s weight to determine which size is right for them.
Adjustable size allows for a custom fit.
Non-greasy, odorless, easy-to-use.
Starts to repel and kill fleas within 24 hours of initial application.
Provides 8-months of continuous flea and tick prevention
Seresto remains effective following a shampoo treatment, swimming or after exposure to rain or sunlight. Under normal conditions, effectiveness lasts for 8 months.
Veterinarian recommended.