Features:1. Made of high mass materials, it has exquisite workmanship.2. It is practical and wear resistant.3. Speed: 6speed/ 7speed4. Equipped with a 11T guide wheel 5. professional accessories for mountain bikes, practical and wearable.6. rear derailleur features smooth and crisp shifting at all times. 7. Easy to install and Easy to disassembleSpecification:Color: Black Cage: long Total capacity: 34tMaximum sprocket: 28tMinimum sprocket: 14tFront sprocket tooth difference: 20tCompatible mounting type: direct mounting and hub Screw mounting (suspended mounting)weight:252gcategory:Rear shifting and Eye shiftingPackage Including1*Rear Derailleur