... *40mm. Material:50CrVA No of leaf: 2 leave air suspension beam spring 1.Nameair suspension beam spring 2.standardDIN, ASTM,JIS,BS,AS,ISO,GB,Nonstandard bolt ... make a full range of multi-leaf spring and parabolic leaf spring and Z-type leaf spring product which is used in heavy ... Asia, Mid-East, Euro, North-America, South-America and Africa. air suspension beam spring