G.O.T.H. CHASSIS MODULES - for 1.13" ID section - 28mm bass speaker holder (Veco speaker sold at TCSS or Plecter Labs). Due to its size, the 28mm speaker needs to be glued to the holder. Holes available for 4-40 threaded rods in order to attach other Chassis Modules available in this store. These holes are compatible between all sizes, so you can mix modules between different sizes according to your saber structure.