Amazingly small and super bright 3-1 (Run-Turn-Brake) rear indicator lights. Engineered in Germany with SMD-LED technology. Die-cast housing with 8 mm (M8) thread. Tinted glass with 0.4″ (11 mm) diameter. Direct fit on most M8 Softails. Some applications may require the use of a load equalizer.. Older Sportsters, Dynas and Softails may require minor modifications to strut to fit..