<p><b><i>You Only Live Once, Just FOllow Your Heart. JFOYH is committed to providing good products and services.</i></b></p> <p><b><br></b></p> <p><b>Detailed Specification</b></p> <p><b>1 OF 4: Rear Derailleur 1x12s</b></p> <ul> <li> Carbon Cage</li> <li> Mega Sprockets:50-52T</li> <li> Shadow RD with Slant Design</li> <li> Big Bearing Pulley</li> <li> Weight: 0.62lbs</li> </ul> <p><b>2 OF 4: Shift Lever 1x12s </b></p> <ul> <li> 1:1 Tech Make Precise and Quick Response</li> <li> Aluminum Shift Lever</li> <li> Shift Cable with Hyper Low-friction Coating Tech</li> <li> Weight: 0.26lbs</li> </ul> <p><b>3 OF 4: 12 Speed Golden Cassette</b></p> <ul> <li> Model: R12 Gold</li> <li> Size: 11-52T</li> <li> Chain Guide Groove</li> <li> Lightweight & Durable</li> <li> Aluminum Alloy Bracket</li> <li> Using High-strength Steel for Automobiles</li> <li> Weight: 1.6lbs</li> <li> Ratios: 11-13-15-17-19-21-24-28-32-34-40-46-52T</li> </ul> <p><b>4 OF 4: 12 Speed Ultalight Chain</b></p> <ul> <li> Model: S12-TIC</li> <li> Specification: 1/2"*11/128", shaft length 5.25MM</li> <li> Length: 128 Knots</li> <li> Color: Golden</li> <li> Compatible: SHIMANO/Campanolo/SRAM 12S system</li> <li> Application: Mountain bike</li> <li> Weight: 0.57lbs</li> <li> Packing: Original boxed, with a pair of special magic buckles</li> </ul>