Sram's Flat-Top chains are specifically designed for modern 12/13-speed drivetrains and are characterised by their distinctive flat top profile. This design allows for a narrower chain while still providing high strength and durability.   Flat-Top chains are exclusively compatible with Sram's 12-speed AXS drivetrains or Transmission/T-Type. They are not compatible with other 12-speed systems or older Sram groups.   KMC GO Wax Benefits Long lasting: Once applied, the wax dries to form a protective barrier that outlasts oil based products. Less dirt: Waxed chains attract less dirt, minimising the common causes of wear and ensures a smooth operation at all times. Biodegradable: Free from PFAS and harsh solvents. Easy to use: Easy to apply and the chain does not need to be dewaxed before rewaxing..   Silver Nickel-Plated Coating Nickel is an alloying metal primarily used for refining steel. With corrosion resistance, enhanced hardness, and proves highly effective as rust protection.   Specification 1/2" X 11/128". 126 Links. Waxed with KMC GO. Missing links included. Compatible with all SRAM 12-/13-speed derailleur systems using flat-top chains. Weight per 110L: 262 grams.