Aluminum shelf standard Easy to cut to desired length Designed for press-fit mount without using screws New slot shape to prevent shelf support from falling off Screws and accessories sold separatelyWARNING: This product can expose you to chemicals including chromium (hexavalent compounds), which is 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.