OEM Jupiter sousaphone & tuba set of 3 or 4 springs.
19mm x 75mm
Fits Many, contact me if unsure:
CT-300
JCB-584L
JCB-584S
JSP1000
JSP1000
JSP1000S
JSP1010
JSP1010S
JSP1100
JSP1100S
JSP1110
JSP1110S
JSH-596L
JSH-596S
JSH-696L
JSH-696S
JSH-594L
JSH-594S
JSH-590L
JSH-590S