Kmc x8 ept 8 speed chain ecoproteq anti rust technology kmcs x bridge for faster and smoother shifts extra stretchproof treatment for longer chainlife features size 12 x 332 links 116 pin length 73mm weight 330g for shimano campagnolo and sram 678 speed derailleur systems hi performance ecoproteq coated anti rust technology extremely durable non directionalkmc chainsfor many years kmc has enhanced the technology behind bicycle chains through research development continuous inn