Looks like a piece of plexi screwed onto the opening to me. The six foot pump came out two different ways, one with face bezels with glass and one with no face bezels that used a "flat" faceplate with a plastic edge that sealed against the door opening and clear plastic inserts in the gallons delivered and price per gallon holes. The add glass was plastic and screwed into the ad glass opening. No face plate glass was used, as in the first pics that was posted on this thread. Brady