1,Nabla clip/Nabla elastic rail clip 2,Material: 60Si2Mn 3,Hardness: HRC41-48 4.certificate:ISO9001:2008.SGS 5,OEM Products name: rail clipMaterial: 60si2mn, 38si7,60si2GrHardness ranging from 44-48Surface treatment:plain,hot dip Galvanized,zinc plated,bituminous coating or according to customers requirement.Series:1) I-clips,II-clip,III-clip,IV-clip,V-clip,VI-clip,V-clip,VI-clip,VII-clip,VIII- ...