Main Drain Sign, Aluminum, 6" x 2" Aluminum signs have a white background with red ink. They meet NFPA Standards. They come with 3/16" diameter attaching holes that are pre drilled for easy installation. Product sold in the following options: * Sign Only * Sign With 12" Installation Chain WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov