Locker End Panel is constructed of 3/8 in 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 Deep Blue High Density Polyethylene plastic. The End Panel is 18 in D and 72 in H. Mills Company warranty of 20 years on plastic components against rust, delamination and breakage under normal use.