Achieve cooler air in your home with the help of a Dial Mfg Evaporative Cooler Pad. This corrugated board measures 40 L x 28 W x 12 H and features a rigid texture that allows for high air velocity when used inside of an air cooling system which results in a colder air output from your appliance. They can be easily installed in your cooler and make a practical choice for those without access to central cooling or those who want extra air in a specific area. These evaporative cooler pads with rigid media are designed for a long life and are suitable for use in Mastercool evaporative air coolers.Mstrcool Media 40 L x 28 W x 12 H: