Popco offers an extensive selection of suction cups, with and without sign holders, hooks, screws and tacks for supporting p.o.p. signs. Popco’s suction cups range from 7/8-inches to 2.4-inches in diameter and are made of clear PVC. Many of the Popco suction cups feature a mushroom-style cap. With this feature, signs that have a keyhole cut can be hung with the just the suction cup. Other styles of Popco suction cups feature hooks, tacks, screws, adhesive tabs or springs, providing many options for displaying signs. Popco manufactures the suction cups entirely in the U.S.A. from proprietary tooling. For more information, visit. (Web Site) www.popco.com