Environmentally friendly material: We use environmentally friendly materials, the suction cup handle is made of aluminum alloy, and the bottom of the suction cup is made of natural rubber. No chemicals or other materials are used in this product. Easy to use: First you need to make sure the is flat and without holes, then adjust the handle to a separate state and place the suction cup black on the side of the item. Finally, press the suction cup vertically and lift the object with the suction cup handle. Wide Applications: This suction cup is perfect for moving and positioning glass panels, plastics, windows and doors. It can make work quick and efficient. Warm reminder: It should be used on flat, clean, smooth, non-porous and dry surfaces. Please ensure sufficient suction to lift. Problem Solving: We will provide a high quality product, if you have any questions, please contact our customer service team.