4 Pack Replacement Air Purifier Filter 30931 fits Hunter Models 30212, 30213, 30240, 30241, 30251, 30378, 30379, 30381 & 30382 by LifeSupplyUSA Fits Hunter Models 30212, 30213, 30240, 30241, 30251, 30378, 30379, 30381 & 30385 Approx.14 1/8 x16x1" This humidifier filter is designed to prevent growth and migration of mold, fungus, algae, and bacteria. By LifeSupplyUSA