GENUINE JUPITER VALVE SPRINGS FOR TOP OUTER SPRUNG MODELS OF CORNET, TRUMPET ( SET OF 3). THESE GENUINE JUPITER VALVE SPRINGS ARE SUITABLE FOR THE FOLLOWING JTR-308 JTR-408 JTR-600 (#-602700 & Mouthpiece Receiver STR-) JTR-606M (- #602700 & Mouthpiece Receiver STR-) JTR-606MR (- #602700 & Mouthpiece Receiver STR-) JPT-416.
