The grille by common production, it is to use high strength synthetic materials and ribbon woven, also called the high strength

 

They are using high strength steel wire spring by the special welding welding technology for a mesh structure.As its materials tensile strength as high as 1470 MPa above, far more than ordinary reinforced 320 MPa tensile strength.

In practice it has proved, 3 MM high strength steel wire nets can instead of 8 MM ordinary steel mesh.At the same time,their contact shear strength is above 2000N.