Home Revolution Replacement Humidifier Filter, Fits Lasko 1128, 1129 and 9930 humidifiers and Part THF-15. Designed to fit: Lasko 1128, 1129 and 9930 humidifier models, compare to Lasko part # THF-15. Replace with confidence: We back all of our products with a 100% satisfaction guarantee Breathe easy: Layered wicking filtration system prevents dirt, dust, minerals, and mold particles from being released into your home & keeps the air you breathe fresh and clean The Home Revolution Mantra: High-quality replacement products at a low price What you get: 1 humidifier wicking filter