KMC X11EPT Eco Proteq 11 Speed Chain Take rust protection to the next level with the KMC X11EPT Eco Proteq 11 Speed Chain. Treated with the Eco Proteq coating, this chain has double the rust resistance compared to the RB(Rust Buster) treatment. While improving the longevity against rust, the smoother coating also offers less noise and higher performance. Features ECO PROTEQ TECHNOLOGY DOUBLE X BRIDGE SHAPE 650 HOURS SALT SPRAY STRETCH PROOF TREATMENT 116 Links 1/2"x11/128" MTB and Road Compatible Campagnolo, Shimano, Sram Compatible 11 Speed | Kmc | X11Ept Eco Proteq 11 Speed Chain | Gray | 11 Speed, 116 Links