Greenbrook Norslo Catenary Wire Kit is made of steel with galvanized finish. Kit includes 3mm x 30m wire, 400kg breaking strain, 4 x grips (CWG), 2 x eyes (CWE), 1 x 4″ Strainer/tensioner (CWT), 1 x ring plate (WRP) and 1 x hook plate (WHP).