The E7 is built with thicker leg columns. Plus, the column gap is scientifically designed to be 0.05 mm, which is the optimal setting for the stages of columns to move just smoothly. The E7's base structure uses solid carbon steel, which has reached automotive-material grade, for a durable and sturdy experience. The E7 always stays stable even when you top your stuff unevenly on the desk. The E7 is stable at every angle. It will never topple over or wobble even while multitasking. The E7 is sturdy enough to stand still even when raised to the highest level. Wobble-free whether you are typing or gaming. The E7 moves up and down smoothly to keep your devices in place during height adjustments.