This hand pump activated Suction Cup is made from sturdy aluminum and has a dual indicator system warning of any vacuum loss. The dial gauge has a color coded indicator that instantaneously shows any loss of suction and the pump lever has a red indicator mark warning of suction loss. If a loss of vacuum occurs, additional re-pumping can be done at any time to secure the tile. The 8" non-marking cup has a triple layer of suction providing a sure grip even on textured tile surfaces. Lifting capacity is 80 lbs.