The Z8 has been upgraded from the RB treatment to the EPT treatment. EcoProteQ treatment doubles the rust resistance compared to the RB treatment. This smoother coating also means less noise from the chain, greater performance, maximum rust resistance and a great look. Double X Durability, unmatched chain life- KMC guarantees your satisfaction! EcoProTeQ Anti-Rust technology, NON-Directional Design: assembly of this chain is independent of direction! It allows maximum compatibility, no matter MTB or Race: this chain fits all.**Pin Power**: The unique KMC Bulls-Eye pin mushrooming technique, which provides 200kgf of average pin power for unsurpassed side plate retention.**Noiseless**: Special Z bridge side plate configuration and chamfering provide excellent shifting performance and minimise noise even with a mix of different derailleur components.**Nimble Shifting**: The Z bridge side plate configuration means faster, smoother, quieter and more precise shifting.* 1/2" X 3/32" - 114 Links, pin length 7.3mm* Compatible with: 6-12-18-21-24 speed* For City, MTB, Race, Trekking and Hybrid* Tensile strength 1020kgf* Bushless construction* EcoProteQ Treated* Less maintenance