Trumpet bottom valve cap
Fits models:
- Jupiter 1000S - prior to serial number 800001 with mouthpiece receiver beginning with STR
- Jupiter 1002S - prior to serial number 800001 with mouthpiece receiver beginning with STR
- Jupiter 1010S - prior to serial number 800001 with mouthpiece receiver beginning with STR
- Jupiter 1200S - prior to serial number 800001 with mouthpiece receiver beginning with STR