Shimano SLX M7120 2x12sp Rear DerailleurThis stunning rear mech delivers fast and slick shifting for more efficient performance on rough off-road terrains. Its newly added pulley cage bumper both protects it from trailside obstacles and keeps it running silently in all gear positions. Topping it off, is its low-profile design which features an extra wide 12 speed range, giving you advanced shifting performance and more confidence on the trails. Features: Material: Alloy Size: Long Cage Speed: 12 speed Use: MTB Compatible Chain: HG 12 speed Bushings: 4 fluoric coated link bushings Low Sprocket Max: 45T Low Sprocket Min: 45T Top Sprocket Max: 10T Top Sprocket Min: 10T Total Capacity: 45T Pulley Teeth: 13T Spring Type: Shimano Shadow RD+Technologies: Shimano Shadow RD+: Less distraction and a quieter drive train. Rear derailleur stabiliser reduces chain slap. A simple solution for chain drop. Lighter and more efficient than a roller type chain device. A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.