8" Metal Handle Vacuum Cup with Low Pressure Audio Alarm

8" Metal Handle Vacuum Cup with Low Pressure Warning Audio Alarm. High-density aluminum alloy frame with brass plunger. Red-line indicator on the pump plunger warns user of any vacuum loss. Check valve allows Re-pumping without loss of remaining vacuum. Protected release valve lever allows for quick and complete release of cup from surface. 220 Pounds loading capacity. GS Rated loading capacity 140 Pounds with a safety factor of 2. For use on flat nonporous surfaces such as glass, stone and sheet metal. This suction cup comes complete with a face cover and carrying case. 1 Year Limited Warranty (Subject to Inspection). Important Note: Never exceed the recommended weight limit of this cup. Caution: Cups must be kept clean and stored in carrying case when not in use.