FCS II Compatibility Kit Fin System_FCS 3 x 1-1/4" (35mm) and

3 x 1-1/4" (35mm) and 2 x 1" (25mm) M8 Stainless steel screws

Quickly cuts flying lines in the case of an emergency

MR's signature fin for twin

The putty is activated by a kneading motion and can be surfed while the putty is curing

This easy to use

FCS II Compatibility Kit Fin System_FCS 3 x 1-1/4" (35mm) andTo fill the gap between the front tab of the original (dual tab) FCS fin and the front of the FCS II plug front slot. No you can't put your fins in backwards. but you can use all your favorite original FCS fins in the new FCS 2 boxes by using the FCS 2 adapter kit complete with flush forward fairing kit. Check out the pic of Trips Stretch PCs in the new FCS 2 boxes on a Lost MC Metro.