The Snap & Grow™ 6' Series greenhouse has been engineered from the ground up to get you growing quickly. It features the innovative SmartLock connector system that allows you to assemble the heavy-duty, aluminum frame quickly and easily without a lot of hardware. The innovative split door and vent windows are even preassembled out of the box! The tough, crystal-clear polycarbonate panelssimply slide and lock into place without any complicated tools or hardware. Get growing so you too can start to enjoy greenhouse gardening in a Snap! The base model 6' x 8' includes one roof vent, the 6' x 12' includes two vents, and the 6' x 18' inlcudes 3 vents for extra ventilation. All models include a galvanized base kit for affixing your greenhouse to a wood or concrete foundation.