The Dust Level Window is made from 1/4'' Polycarbonate. Dimensions are 1-1/2''x 11''. The back of the plastic is cut like a miniature raised-panel door; the panel extends about 1/16'' through the 1/2'' slot in the trashcan. The back side of the window is painted Black. The window is secured with 10-24 machine screws, and lock nuts, and sealed with GE Silicone II Household Clear Glue.