The Diameter of Vacuum Cups Is 4Inch ,The Suction Pad Thickness Is 7Mm.and Glass Suction Cups Maximum Lifting Weight Is 200Lbs . Aluminum Vacuum Suction Cups Are Designed with Dual Mechanism Produces Exceptional Suction Cup Strength . The Heavy Duty Glass Lifter Is Also Easy to Use, As You Only Have to Tighten The Two Clips to Produce The Suction In Desired Handling Area . This Suction Cup Is Lightweight But Produces Great Suction and Is Manufactured from Durable Plastic and Rubber Suction Cups . This Suction Cup Can Be Use for Fix Gapped Laminate Floors As Floor Gap Fixer, In Bath for Safety, Using As Use As Tile Suction Cup Lifter, Rail When Showing, Wake Shaper, and Moving Heavy Glass Wall, Aquarium .