... Advantageous:Different kinds of curbstone according with EN-1343: RV,RF,GV,GF,A,B,V22,R17,V17... Material: ... grey/red/white/black graniteProducts name: curbstonePlace of origin: Shandong, ChinaMaterials ... : grey graniteStandard: EN-1343Finishes: flamedPhysical characteristics of the material grey granite G341:1). Natural density: 2.67+/- 0.02 ...