The Qronz XB-C100-BK is an adapter for the Qronz line of tower signaling lights, used to attach the tower light to the pole. Top thread is M30, bottom thread is M20. Made from ABS plastic (70%) & polycarbonate (30%). Works for TL50, TL70, CL50, RL50 & RL90 series. Note: This does not come included with the tower lights
