Locker End Panel is constructed of 3/8″ thick HDPE material. End Panel for Flat Top is a finishing panel for exposed sides of Standard or Z Lockers with a flat top. Constructed of Gray High Density Polyethelene plastic. The End Panel is 18″ deep, and 60″ high. Mills Company warranty of 20 years on plastic components against rust, delamination, and breakage under normal use.