It also has a unique triangular aluminium framework for enhanced durability and stability, two adjustable roof vents for good air flow and moisture and not least, an effective gutter system for smooth drainage. So enjoy your green passion throughout the four seasons and let the green fingers aluminium greenhouse facilitate healthy growth in the way that nature intends it to be. Features unbreakable double-walled pc panels crystal clear sturdy rust-resistant aluminium frame aluminium frame base for structural support lockable door double doors gutter system easy to install. Specifications: material: aluminium and pc overall dimensions: 422 x 250(include gutter system) x 195 cm (l x w x h) vent size: 60 x 58 cm door size: 61.5 x 160 cm capacity: 20.57m ground surface area: 10.55m wall height: 116cm assembly required: yes please note: the item comes in 2 packages. Package content 1 x aluminium greenhouse 1 x manual.