Better Vacuum Cups says with the DS132147 cup, the machine operator does not have to remove the spoilboard and plug holes. With this double-sided seal they can rotate or place the cup anywhere on the spoilboard. Operators can keep machines running solid wood, plastic, composites or whatever material they may have. The cup measures 132 x 147mm and is also stackable for five-axis work. At 35mm height the user can easily go to 70mm.