Trumpet valve springs, 3 included

Fits models:

• Jupiter 600ML - prior to serial number 602700 with mouthpiece receiver beginning with STR
• Jupiter 600MS - prior to serial number 602700 with mouthpiece receiver beginning with STR
• Jupiter 600NL - prior to serial number 602700 with mouthpiece receiver beginning with STR
• Jupiter 600NS - prior to serial number 602700 with mouthpiece receiver beginning with STR
• Jupiter 606MRL - prior to serial number 602700 with mouthpiece receiver beginning with STR