This linear fitting system designed to accommodate MONOKEY series cases consists of a black tubular side case holders for the mounting of two side cases, light but at the same time robust. Its essential lines however do not spoil the motorcycle profile and its simple structure allows you to carry out the assembling/disassembling operations quickly and easily. PL series tubular side frames can be combined with GIVI's Monorack system to add a top trunk solution, additional hardware maybe required to mount PL series frames for side case use only.