These Machi rings were designed to fit the Mellody Box's recessed 510.
They are available in the following sizes:
The Mellody Machi's fit SOME JMFD and FMB mods but fitment is not guaranteed due to slight variances in dimensions.
16mm Mellody Machi15 in stock
18mm Mellody Machi14 in stock
22mm Mellody Machi20 in stock