This zig zag-shaped wire allows the fixing of greenhouse plastics to the profiles installed in the structures. You will only have to place the plastic or the greenhouse mesh on the profile and insert the wire by stretching until it fits inside the profile, leaving the plastic fixed. This type of profiles allow a quick change of the plastics of the greenhouse due to breakage, deterioration or change of seasons. The stretched wire reaches almost 2.5 m. extended, so it is used with a 2.5m long profile or two units for 5m long profiles.