This glass light lens works on the Peterbilt cab lights 1998 and newer. It replaces the plastic lens. It is 2-7/16 inches tall and has an 3-1/2 inch diameter. It is the watermelon style with two cut outs for the screws. It works with the glass cab light conversion kits for Grakon 1000 and truck light conversion kits, also. New, bulk packaging. Each.