Olive for brake hoses Magura. Olive can be used for kevlar and also plastic Magura hoses. You will use this olive after cable shortening or new installation / replacement of master. Olive will press the hose inside the lever or caliper thanks to sleeve nut, so the hose is firmly connected to the Magura lever or caliper. Olive is made from soft metal, so it can me pressed with only tightening with sleeve nut.