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.
External Handles for Emergency Escape.
Outside Dimensions : 21″ x 21″.
Inside Dimensions : 17.75″ x 17.75″.
Cutout Dimensions : 18.5″ x 18.5″.

Jim Black Escape Hatch 18.5″ x 18.5″