HomCom 30" x 36" Industrial Galvanized Steel Roof Hatch &ndash; Red Constructed of top quality galvanized steel that is durable and rust resistant Flexible pneumatic and supporting rod with soft steel rope and pivot hinges for smooth operation Set with cement and an inside locking handle for ultimate safety consideration Fully welded for complete weather tightness and protection against intruders Dimensions: 3.3L x 3W x 1.1H