The galvanised wire hoops are built into the cover, and the tunnels fold away concertina-style for easy storage. Drawstring feature enables open or closed ends for ventilation or maximum protection. UV stabilised clear polythene gives complete weather protection and makes the most of spring sunshine to warm the soil and bring crops on quickly. Standard Size 3m Tunnel: Length 3m (10'), Width 45cm (18"), Height 30cm (12"). Pack of 2 tunnels.