Item Description-X11SL: superlight chain for use with 11speed Campagnolo drive trainsX10SL: superlight chain for use with 10 speed Campagnolo or Shimano (Gold color is Ti Nitride coating), 241g-X10SL DLC: superlight chain for use with 10 speed Campagnolo or Shimano with Diamond Like Coating for extra durability, 241gPink Lady chains are a limited edition with 15% of sales going directly to the Pink Ribbon FoundationX9SL: superlight chain for use with 9 speed, 252gX9.93: upgraded version of the Z-9000 chain stretchproof, super-narrow chain for use with 9 speedSave an additional 10% on 25/box bulk X9.93 chains, does not include aftermarket packagingZ72: chamfered inner plates with Bulls-eye rivets for 7-8 speedZ51: standard bushingless, chamfered plate chain for 5-8 speedZ30: economy bushingless chain for 5-6 speedItem Specificationsmodel: X10SL DLCuse: 10 speedsize: 11/128"width: 6.2mmlinks: 112color: red/blackpackage: each: