metal spacers: High precision , and high quality mechanical component metal spacersJiangsu Giant Ally Imp. & Exp. Co., Ltd.is a high-tech enterprise focusing on the designing and manufacturing of precision components.We have established a long term relationship with the world top 500 enterprises: Bombardier, Danieli, Siemens etc.Specification:Specification:Material: H13, 42CRMO, 35CRMO, 40CRNIMO, ...