4 - 18oz Bottles of Oster Oatmeal Flea & Tick Shampoo is an 18 fl.oz shampoo designed for adult dogs weighing 0 to 22 lbs. It is formulated with oatmeal to soothe and moisturize the skin while effectively killing fleas and ticks. The product is registered with EPA and has a model number of 078590-935-001.