More than 15 years' experience More than 4000 different kinds of products for over 30 kinds of vehicles Professional experience for North America and South America marketing Based on Vulpes brand and OEM brand The ball stud is made of 45CR alloy steel The ball cover is made of #45 steel Ball socket: Dupont America (Polyformaldehyde) The product is suitable the ambient temperature: Max temperature 130 deg. C Min. temperature - 40 deg. C We have the advanced equipment and the enough production ability to develop chassis parts, welcome the drawing and sample