Magura Cover Kit For 4-Piston Caliper Replacement Parts If you need replacement parts for your Magura 4-piston hydraulic disc brakes, then you're in the right place. The Magura 4-Piston Caliper Cover Kit comes with colorful rings for your 4-piston calipers. It comes with four of each color and is for one caliper. Features Designed for one caliper Comes with four of each color Manufacturer's part number: 2701719 | Magura | Cover Kit 4 Piston Caliper Neon Green, Cyan, Mint Green