BASE Galvanised steel base, green coated to match the frame. Simply bolt together, much easier than building a brick base. Provides a secure and level foundation for your greenhouse. The greenhouse base gives an extra 5 (13cm) of head room. Frame Quality green coated aluminium frame. Will not rust or tarnish. POLY CARBONATE GLAZING Twin wall construction. Safe, light and easy to handle. Easy to install. No danger to children and pets. Diffused to prevent scorch ideal for young and delicate plants. More even temperature. Better winter frost protection. Earlier flowering and crops. UV treated for a longer life