NO ASSEMBLY REQUIRED; ready to use right out of the box!. Mounting option: free standing. This highly portable gate is constructed of painted wood and steel. Gate consists of 6 panels: 5 are fixed + one that is 2 parts and forms the gate door. Max straight-line width is 15? with 16? deep side panels. Pen/Hexagon max span: 52? wide. Rectangle: 30.5? wide x 61? length.