The Equalizer JVT193 Visual Vacuum Plunger Cups are a professional-grade pair of 7-inch suction cups designed for installing and removing curved automotive glass. Each cup supports up to 90 pounds and features a visual red-line safety indicator that disappears when a proper vacuum seal is achieved and reappears if pressure is lost. The cast-aluminum handles are secured with high-strength bolts for durability, and the folding design allows compact storage. Engineered specifically for curved glass, these cups provide secure handling for windshields, back glass, and other contoured panels.