Magura Blood Hymec Hydraulic Clutch System Oil - 4ozMagura Blood! The only mineral oil that should be used to bleed a Magura hydraulic system. Unlike DOT brake fluid, this blood mineral oil does not absorb water! It is also safe on paint and won't irritate your skin. With roots reaching back to 1893, Germany-based Magura has been dedicated to the art of designing top-tier motorcycle parts while setting the standard in safety and innovation. DCC is proud to offer select parts from their catalog that had previously been unavailable direct to consumers. The well-worn stamp of the Magura name on your product ensures it has many decades of German engineering behind it.