Live Springtails, Tropical White: Large Breeding Culture [ONE SIZE FITS ALL]No matter your dog belongs to small, medium or large size, flea and tick control collar adjustable may fit them properly. Flea and tick prevention collar is designed to 25inch more compatible for all size dogs. Just cut the excess length if the collar is too long for your lovely. [UP TO 8 MONTHS OF PROTECTION] Maxtry flea and tick control collar is an effective medicine for tick repellent up to 8 months. The active ingredients will function best during this time. Great pet tick and flea treatment prevention for dogs and cats. [EFFECTIVE PROTECTION]Even veterinarian recommend pets parents to use flea and tick collar to protect your dogs from fleas, ticks, lice, larvae, mosquito. Purchasing flea and tick prevention collar is a truly economic way to avoid the hassle of monthly treatments. [NATURAL AND SAFE] With the composition of natural oils including Eucalyptus and Citronella oil, pet treatment collar do no harm to health of your dog. Non-chemical composition cause no harm, no irritation to your dog and cause low concentration to your dog. No bad odor to the surrounding environment. [WATERPROOF]Waterproof flea tick collar design is of advantage for dog to carry out their outdoor activities without any hassle. No need to take off the collar even swimming, bathing, or playing in the rain.