These are brand new Bicycle M5 Barrel Adjuster for Brake Cables and Rear Derailleur Cable. Comes in packs of 3, 5, 10. They are universal to all brake calipers and rear derailleurs that have M5 threading. Picture and video shows M5 barrel adjuster with Ultegra 6800 and Ultegra 8000 rear derailleurs. Made of black plastic and steel. Free shipping, ships via USPS Ground Advantage with tracking.