F4 Foils back wing shim set. Set of 6 shims to trim the angle of the back wing. The F4 Foils back wings shims can be used for any F4 foil and on any fuselage.

The F4 Foils back wing shim set contains shims to generate more lift and to generate less lift.

F4 foils back wings set includes:

• -1.5 degrees
• – 1 degree
• -0.5 degree
• + 0.5 degree
• + 1 degree
• + 1.5 degrees

The set comes with a handy clip to keep your shims together.