Rotalux Speedring Bowens S-mount. The new strengthened Rotalux speedring ensures that the mechanical moveable parts will withstand hard work stress and when assembled and disassembled. Now just one Elinchrom speedring to build 11 Rotalux shapes. The blue and red colour marks will indicate and help how to setup square/ recta and strip shaped Rotalux Softboxes. Elinchrom speedrings could be identified by the Elinchrom brand, molded on the speedring.