Cooler Pads (Wholesale) is a subdivision of the Plumbing and Heating Equipment and Supplies (Hydronics) (Wholesale) industry. Companies in this industry specialize in the wholesale distribution of cooler pads, which are used in evaporative coolers to provide a cooling effect. Cooler pads are made of materials such as aspen wood, synthetic fiber, and cellulose paper, and are designed to absorb water and cool the air as it passes through the cooler. Companies in this industry typically purchase cooler pads from manufacturers and distribute them to retailers, contractors, and other businesses that install and service evaporative coolers. They may also provide related products such as pumps, motors, and thermostats.