Dial 3004 Aspen Evaporative Cooler Pad, 20 Inch x 36 InchThe Aspen Snow Cool pad is the most efficient and economical cooler pad on the market. The pad construction allows for even air flow throughout the entire pad. It is designed for fast pad saturation and helps to prevent sagging of pads, which ensures the fastest cool air delivery, more efficient operation and reduces the debris that clogs pumps. Highlights: Size: 20 inch x 36 inch Expands to extra thick when wet for max cooling Uniformly distributed