This is the master for a new fin I've made,
9high, 95mm long, 8mm wide it will come with 2 M5x16mm 316 stainless screws.
I was making them for Mutant and directional boards. They have the same screw width as most 2 hole twin tips. They wont be ready for a couple of weeks yet. If you're interested message me
I also make 40mm & 50mm fins which i can send you a picture of if you want.
A set of my 4 fins costs around the same as 1 of a name brand.
Regards
Paul