Magura Gustav Clamp Assembly Includes The Clamp Screw If your Magura Gustav brake doesn't have a clamp, you'll want to get a Magura Gustav Clamp Assembly. This clamp is for mounting Magura disc brake levers to the bar. The Gustav Pro lever clamp includes a master clamp fixing screw. Features Clamps for mounting Magura disc brake levers to the bar Includes the master clamp fixing screw Magura part number: 2703057 | Magura | Gustav Clamp Assembly 1 Set