1.Certificate: ISO/BV/SGS/AAA 2.Standard:ISO/DIN/ANSI 3.Color available:blue/yellow/natural 4.Tensile Strength:20%-25% higher S type steel agricultural chains: S32,S32V,S42,S45,S51,S55 and attachment A type& CA type steel agricultural chains: A550,A555,CA550,CA555 C type steel agticultural chains; Agricultural Chains With Attachment