Fotodiox Speedring, for Speedotron Black Line 202VF, 206VF, 102, 103, 105, Brown line, M11 Strobe Flash Light Light, Speed Ring All Metal Design, fits standard 1/4" (6mm -7mm)rods. Standard Speedring for Rectangular or Octagon box Rotation Ring with thumb screw lock Smooth surface for effortless mount 24 Month Manufacture Warranty