you need:
4mm steel balls *1pcs)
D2F-L-D3*1 pcs.
bowen Connector, copper ring.
m2*10 or m2*8 (Tapping screws*10pcs).
The copper sleeve can be used in the original packaging of mellow. If you don't like their design, you can replace it in this way
The author marked this model as their own original creation.