The Suction Cup w/Hook - 1-3/4" Dia. is a semi-permanent attaching system that works especially well on glass windows and doors or any other flat, polished surface. The 9000H measures 1-3/4" dia. and comes with a steel hook that rotates on the center of the suction cup to hold literature, banners etc. securely. *A Note about Weights - A1 Package Co. makes no claims as to the weight retaining capabilities of our suction cups. They are designed for lightweight applications only. If you need to determine if the items we carry will work for you, we recommend making a small purchase of them to see for yourself if it will work for your needs. A1 Package will not be held responsible for the use of our product once it leaves our facility.