DESCRIPTION The Box One chain is protected by our dual-coating. We start with Nickel plating which aids in corrosion resistance and then top it off with the "Diamond-Like Carbon" layer. The DLC is as fancy as it sounds; a synthetic diamond nano-coating that turns up the volume on hardness, wear-resistance, and slickness. All Prime 9 chains have chamfered shifting edges, solid plates and solid pins to safeguard durability. Our unique inner link spacing is engineered to grab those modern wide/narrow chainrings. We chose to modernize the 9-speed platform due to the chain's spirited reputation. They also work well with BMX 3/32" Chainrings and Cogs. FEATURES ~ Our Best Performing Chain ~ Durable Dual-Coating DLC & Nickel Protection ~ Durable Hardened Solid Pins ~ Wide/Narrow Chainring Compatible ~ Compatible with BMX 3/32" Chainrings and Cogs ~ Compatible with most 10,11, & 12-speed wide / narrow chain rings. ~ Prime 9 Technologyâ„¢ ~ Prime 9â„¢ Drivetrain Compatibility Manual > https://docs.google.com/document/d/1F6A_32GmwOD9-8KM8o-5TbhpFC9fEQ6jJPa-h7CuXpM/edit ~ Why Prime 9? > https://4382721.app.netsuite.com/c.4382721/Images/Why%20Prime%209_%20V5.pdf SPECIFICATIONS Material Hardened : Alloy Steel Weight : 305g/10.7oz COMPATIBILITY ~ Box One Prime 9 11-50T and also 12-50T eBike Cassette Black ~ Box Two Prime 9 11-50T and also 12-50T eBike Cassette Black ~ Box Three Prime 9 11-50T and also 12-50T eBike Cassette Black ~ Box One Prime 9 Rear Derailleur ~ Box Two Prime 9 X-Wide Rear Derailleur Black ~ Box Three Prime 9 X-Wide Rear Derailleur Black ~ Box One Prime 9 Shifter Black ~ Box Two Prime 9 Shifter Black ~ Box Three Prime 9 Shifter Black ~ Box Two Chainring ~ Box One Single Speed Aluminum Cogs ~ Box One Single Speed Chromoly Cogs ~ Box Two Freewheel Please visit our website at http://www.ecomtb.com.my OR https://shopee.com.my/eco_mtb ** There is 1-3cm errors due to manual measurement. Please kindly understand. ** Actual product colour may slightly vary due to photographic lighting sources or your monitor settings. ** WE DO NOT DO COD ** ONLINE ONLY ** We support original products only. ** PRICE INDICATED IS ALREADY BEST PRICE, EXCLUDE COURIER