The BestAir 3 Step Golden Solution Humidifier Bacteriostatic & Water Treatment is a liquid cleaner specifically designed for humidifiers. It comes in a pack of 1, with a capacity of 32 oz per pack. The solution features a 3-step system for effective cleaning and water treatment, ensuring the humidifier remains in optimal condition. Made by BestAir Pro, this product is EPA registered and made in the United States, providing a reliable solution for maintaining indoor air quality.