... doors glide effortlessly on height-adjustable, heavy-duty nylon wheels, while condensation problems are non-existent. A choice of ... easy to install and run on smooth-gliding adjustable rollers. Choose from a range of top lights and sidelights ... home.Sliding panels are fitted with durable, smooth-gliding nylon rollers;Get real durability, dustproof, moistureproof, windtight, flexible, easy cleanning ...