Sram MRX Comp 7 Speed Grip ShiftThe Sram MRX Comp twist GripShift 7 speed is compatible with Sram and Shimano Rear Derailleurs. Easy shifting and no maintenance. The ideal choice for those who want simplicity in design and use. Left Side 7 Speed compatible version. Material: 50 mm Overmolded “Shorty” with lightweight Grilon® finish, super soft dual density grip.510845006469