Stock replacement parts and options listed on these pages will fit the 2500 and 2520 Traditional fulcrum tremolos only. Discontinued in 1990, not all parts listed in the diagram are available. Only the parts shown below are in stock. FYI: the only difference between the 2500 Pro and the 2520 Traditional is the saddles. The 2500 Pro had black steel string rollers and the 2520 Traditional had brass string rollers. All rollers can be changed to Brass, Steel or Teflon. Those roller options are listed. Also 2 different styles and size of fine tuners were used. Both are listed below.