Can't work out what fins these use?

[Aaronweir15]

Side socket

Board is a 7.8 circle one. Thing the sockets are a old fashioned so can't find the right fins in the shops :/

[IB_Surfer]

are they RFC fins?

[waikikikichan]

Looks like the bandit boxes that came on China made board. The design was used to by pass the FCS "two tab" patent. FCS two tab should fit fine. But be careful, the FCS key might strip out the grub screws. The Allen keys that came with those were a tiny bit bigger.