This cap spring is suitable for Mimaki JV3 / JV4 / TX2 / DS printers. This is the original Mimaki part (number M800573). This cap spring is 26mm long.
 
Printer compatibility
Mimaki DS-1600
Mimaki DS-1800
Mimaki JV3-130S
Mimaki JV3-130SL
Mimaki JV3-130SP II
Mimaki JV3-160S
Mimaki JV3-160SP
Mimaki JV3-250SP
Mimaki JV3-75SP II
Mimaki JV4-130
Mimaki JV4-160
Mimaki JV4-180
Mimaki TX2-1600