This O-Ring S4 UJF is suitable for Mimaki JF-1610 printers. This is the original Mimaki part (number M700408). This O-Ring has an inner diameter of 3.3mm and an outer diameter of 6.5mm.
 
Printer compatibility
Mimaki JF-1610
Mimaki JF-1631
Mimaki JFX-1615
Mimaki JFX-1631
Mimaki UJF-3042
Mimaki UJF-3042FX
Mimaki UJF-3042HG
Mimaki UJF-605C
Mimaki UJF-605RII
Mimaki UJV-110
Mimaki UJV-160