4793 Humidifier Maintenance Kit - Compatible with 110, 220, 550, 558

Includes Water Panel (10), In-line Strainer (4004), Nozzle (4184), Drain Spud (4223), Yellow Orifice (4231), Scale Control Insert, Water Distribution Tray, and Feed Tube Compatible with humidifiers 110, 220, 500, 500A, 500M, 550, 550A, and 558 Easy installation with simple steps to replace the old filter with the new one in the frame materials with aluminum mesh and porous ceramic coating for long performance Maintains humidity levels between 35% and 45% for a comfortable and healthier environment