Items included in this bundle: (1) SRAM GX Eagle Derailleur, 12-speed, Cable-Actuated, 52t Max, Lunar (1) SRAM GX Eagle Trigger Shifter, 12-speed, Cable-Actuated, Lunar Derailleur Specs:The GX Eagle Rear Derailleur gets the job done with a thoughtfully designed cage architecture that improves chain management. Mounting system and re-positioned Cage Lock offer greater durability Sealed cartridge pulley bearings Backwards compatible, long cage works with both 10-50t and 10-52t 12-speed cassettes Updated cage architecture provides better chain retention and precise shifts Comes in GX Eagle master colorway as part of Eagle Colorsystem and goes with all colors of Eagle cassettes & chains Shifter Specs: The challenges of riding a mountain bike should be kept to roots, rocks, mud, trees, jumps, drops and breathing. Putting total control of your gear selection into the thumb of one hand, it&&';;s simple to find the right gear, right now. The GX Eagle(TM) trigger shifter is the control center of the Eagle(TM) drivetrain. Its internal works have been updated to include a 12th gear, and improved to enhance trigger feel, precision and durability. Weight: 122g Speeds: 12 Compatibility: All levels of Eagle drivetrain systems Material: Forged aluminum trigger