Folding Door Gate, 48" W x 37" H 3/4" Heavy-Duty Galvanized "U" Channel Steel Construction, Designed To Withstand Rain And Snow Heavy-duty 1-1/2" x 1-1/2" vertical member angles and a 5/8" self-securing drop pin that is designed to fit directly into floor holes for maximum strength and security Aircraft quality aluminum rivets are rust resistant, and will not crack or separate Door gate can be installed in any doorway up to 48"W, inside or outside of the jamb, in less than 30 minutes Folding door gate can be mounted left or right and is hinged to pivot completely out of the way when collapsed to provide a safe door opening, 100% clear of obstructions