If you are a garden hobbyist who would like to enjoy flowers and vegetables year round, the Riga Series greenhouse is perfect for you, The roof is kept clear even in the winter months with the help of the hinge free, "onion design", There is no routine maintenance required for these greenhouses which makes them even more convenient, Base only (for use with Riga Vs Greenhouse), Adds an additional 5 inches of height when coupled with the Riga V Large Greenhouse Top, Overall dimensions: 6" H x 116" W x 206" D, SKU: EXTR110