The Open Shower Curtain Ring are designed to slide past a ceiling support. This product is made of solid brass, is covered with a rust-resistant finish, and includes hooks to hang a curtain and liner. Set of 12 heavy-duty shower rings. Corrosion free. Made of solid brass. Designed for use on shower curtain rods that have ceiling or wall supports that prevent shower curtain from being opened completely. Rings are flexible and can navigate around supports that measure up to 1-1/4" in diameter. Purchase 12 rings for a standard 60" or 72" curtain, 24 rings for a 108" curtain, or 36 rings for a 168" or 180" curtain.