In its normal execution, the rollers move together with the window sash. The new Artline Design sliding doors feature fixed rollers sunk into the bottom frame. This allows for an optimum weight distribution and a light and smooth operation. without compromising strength and stability. More importantly, it allowed the designers to lower the height of the bottom frame, leading to a cleaner and more architectural solution with the glass surface now flush with the floor. This ensures more than 99% light throughput.