This top-quality derailleur from Box Components is perfect for 11 speed bikes and is compatible with both mountain bikes and universal models. The sleek black colour of this derailleur adds a touch of style to your bike and complements any colour scheme. The Box Components Two 11 Speed Cope Long Wide is built to last and will provide smooth and reliable shifting for many miles to come. Included in this set is a rear derailleur, which is essential for any serious cyclist. This derailleur is part of the Box Components brand, known for its high-quality bike components and parts. Whether you're a beginner or a seasoned pro, this derailleur is an ideal choice for anyone looking to upgrade their bike's performance. Also fits Shimano Is Brand new in sealed box