Aprilaire 4792 Maintenance Kit. For Models 500, 500A, 500M Humidifiers Part #4839 Actual Size 20 1/16" x

Actual Size 20 1/16" x 24 3/8" x 3 9/16"

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Aprilaire 4792 Maintenance Kit. For Models 500, 500A, 500M Humidifiers Part #4839 Actual Size 20 1/16" xAprilaire Humidifier Maintenance Kit 4792 For Aprilaire Humidifier Models 500, 500A, and 500M Includes everything you need to keep your Aprilaire Humidifier operating like new. Ensure peak performance for years to come The Maintenance Kit 4792 contents include: Water Panel #10 (1) Scale Control Insert #4640 Water Distribution Tray #4331 Feed Tube and Compression Sleeve #4335 Orifice #4231 Drain Spud #4223 Inline Strainer #4004 Owner's Manual