本公司的鐵線圈，采用進口包膠鋼線制成，外層尼龍色澤亮麗，極薄而勻稱；中心鋼材堅硬，歷久不變形，無論外觀及耐用性，均遠勝一般包膠鐵線。 Our metal spirals are made of imported nylon coated wire. The surface of the nylon coating is smooth and lustrous and the core wire rigid, offering far better durability and appearance than other types of nylon coated wire.