EcoProTeQ technology EPT from KMC protects chains against corrosion for twice as long as conventional rust protection and thus sets new standards. Each component of every chain link is treated separately with EPT. Key Features: Model: e11EPT - 1 / 2x11 / 128,Pin length: 5.65 mm,136 L - Weight: 274 g,Triple X-bridge design: makes shifting faster and easier,Anti-rust treated (EPT).