High Quality - The suction cups for glass is made of durable Aluminum alloy body,electric polishing and natural odorless rubber base that can withstand work site abuse.Load Capacity -77 lbs(35kg) is maximum work load lifting capacity of the heavy duty rubber suction cup,55~66 lbs working load capacity in vertical.Ergonomic Design -With quick release and locking lever for each suction cup,the black flip-down tabs makes it convenient to lock the suction in place and provides stability.Wide Application - The glass lifting suction cup can be an ideal glass lifter especially for lifting,moving,pulling,gripping,handling materials such as shower glass,window,tiles,car windshield,frameless mirror and granite. It can be also used to be floor gap fixer that slide flooring planks into place or eliminate gaps.Attention:Please use the glass suction cup on a clean,FLAT,SMOOTH surface.We offer a 30-day replacement or FULL REFUND support to ensure complete satisfaction and risk free.