10 x 8 Supreme Toughened Glass. Our Halls Green Aluminium Supreme 10 x 8 Metal Greenhouse Toughened Glass is a great way for garden enthusiasts to grow a great variety of plants in different seasons. This greenhouse comes in a toughened glass finish. You can also purchase an optional halls auto vent to help you control variations in temperature, it can be attached to any halls opening roof vent. This long lasting & low maintance greenhouse also comes with a 15 year guarantee. Please Note The greenhouse height is raised by Approx. 128mm when purchased with a base. Manufactured by Halls Greenhouses.