Thick wire gauge 6,7 (frame) and 11. The smaller the number the thicker the wire * Unique metal tabs for an extra secure door * Removable pin allows you to add additional pens for added play space * No exposed screws, wires or pins. Suitcase style folding for easy transport * Free outdoor grass anchors. Read our reviews * Free outdoor grass anchors. Read our reviews. * No exposed screws, wires or pins. Suitcase style folding for easy transport. * Removable pin allows you to add additional pens for added play space. * Thick wire gauge 6,7 (frame) & 11. The smaller the number the thicker the wire. * Unique metal tabs for an extra secure door.