These Humidifier wick filters fit Sears Kenmore models 17006, 15408, 29988, 154080, 29706, 299880C, 3215508 and 4215508. Each measures approximately 8 x 26 x 1. AntiMicrobial agent prevents surface growth and migration of mold, fungus, algae, and bacteria. For optimum performance, replace pre-filter every 2 to 3 months.