(4) ea Dial Mfg. # 3070 Duracool 24" x 30" Polyester Foam Evaporative Swamp Cooler Pads Duracool, 24" x 30", Foamed Polyester Cooler Pads Foamed Polyester Cooler Pad Pre-Cut, Non-Allergenic, Doesn't Shed Fiber Can Be Rinsed Out & Re-Installed Made in USA