UV Stable Plastic Resin.
Chemical Resistant.
2″ Hollow Core Seal with .500 Crush for Water Resistant Product.
1/4″ Temper Glass for Strength, Clarity, and Chemical Resistance.
Matching Trim Ring.
Outside Dimensions : 19.50″ x 19.50″.
Inside Dimensions : 16.375″ x 16.375″.
Cutout Dimensions : 17″ x 17″.

Jim Black Escape Hatch 16″ x 16″