Double wavelength mesh grid, Gabions are bins made of double-skinned metal mesh, with hexagonal quadrant, with greater mechanical characteristics than provided by UNI-EN10223-3. The gabions fill in the stone site, creating an elastic, filtering and monolithic structure, to create retaining walls, streams of riverbed, to control the erosion. The wire used to produce Gabions is a wire zinc alloy, galvanized zinc alloy + 5% aluminum and PVC (plastic) coating.