The Richell Convertible Elite Pet Gate can convert to a dog exercise pen, freestanding gate, or a room divider as your pet grows. The dogs gates include a door panel to help you pass through the opening with ease without having to move the entire gate. Each panel locks in place at 90 and 180-degrees to provide extra stability with specially designed caps. Specially designed cap locks panels in place at 90 and 180 degree angles for extra stability Lockable dogs gates door allows easy movement from room to room Convertible Floor Tray is available with this walkthrough pet gate to help keep floors dry and scratch-free Dog exercise pen features beautiful hardwood construction Easy to assemble. If necessary, 2 sets of the gates can be combined for a larger space. DO NOT move panels while caps are on to avoid product damage. 6-Panel (Original): Recommended for small- large dogs 8.8 to 44 lbs. (4-20kg) 6-Panel: 1-1/8" space between wire slats Width of the door opening: 25.6"