PureGuardian 70Hr Ultrasonic Cool Mist Humidifier with Aromatherapy, 1Gal CL_887167485488 The tires are constructed of CL_199252113184 The tires are constructed of a rugged foam like material with a strong rubber inner core Durable materials make this chair more than just another gaming chair Condition: NEW A 1 gallon tank provides up to 70 hours of run time and is great for medium sized rooms Silver Clean Protection fights the growth of mold and mildew on the surface of the water tank Ultrasonic Technology quietly disperses a fine mist providing relief from the dry air Optimize comfort with soothing low and high cool mist settings Aromatherapy Tray option helps create a relaxing environment with your favorite essential oil