Avoid the harmful long-term effects of too much time sitting! Health authorities recommend changing posture from sitting to standing position throughout the day to avoid the harmful long-term effects of too much sitting. Height Adjustable Tables are easy, quick, and quiet to operate and offer the optimal vertical range to accommodate people of all sizes. Choose adjustable height base – 4 to choose from: (A) Deluxe Electric – Regular (B) Corner (for L workstations) (C) Pneumatic Gas Lift (D) Crank Lift. Choose a top style – 3 to choose from in various sizes: 1. Rectangular – Square 2. Rectangular – Beveled Edge 3. Porkchop Top w/Return Top (combined creates ”L” workstation)