blister 2 sets Color: Silver pin: 6.6 mm KMC single use clip EPT, maximum corrosion protection 9-speed KMC / Shimano Size: 1/2 X 11/128 EPT Rust protection redefined. KMC's non-toxic and environmentally friendly EcoProTeQ Technology (EPT) provides chains with corrosion protection (first signs of rust appear after 650 hours of salt spray testing), doubling the durability of conventional rust protection and setting new standards. EcoProTeQ EPT - non-toxic, environmentally friendly - 100% coating: each cell element is treated separately - first traces of rust only after 650 hours of salt spray testing (twice as long as conventional rust protection) - smooth surface ensuring excellent driving properties - minimized dirt accumulation, which reduces maintenance costs.