Do you have FCS fins, and you want to use them with your FCSII compatible fins? Usually, you can place it on your surfboard. Nevertheless, if you wish to have maximum performance, you should use an FCS II Compatibility Infill Kit!
The infills need to be placed in between the fins and the box; in this way, the water will not enter the box, and you will have less friction!
The product used for the infills is a silicone rubber that is highly durable and gentle at the same time as the surf fins and the surfboard tab!
Included in the package you will find:
- 1 x centre plug infills.
- 4 x side plug infills.
- 10 x screws.
This package is suitable for Thruster and Quad fins!