Wunderlich - Top Case Railing Premium (#11861)This is an exclusive, elaborately designed railing for the top case of the R18 Transcontinental, which is both classy and functional. In this way, it sets a design accent while remaining decidedly functional: it accommodates additional luggage or anything that needs to be quickly at hand on the road or that should not be in the top case, such as a wet rain suit. Note: To attach the railing, 4 holes must be drilled in the top case. A clear instruction