These gap seals give you an incredible improvement on elevator and rudder authority as well as reduce drag. Its a must have for all STOL aircraft. Made of EPDM and neoprene blend they will hold up to harsh conditions and you will notice a huge difference immediately after install. All you have to do is press them in and go. No more ugly tape that gets dirt trapped in it and comes loose. In this kit there is enough material to do both elevator gap seals as well as the rudder gap seal. These are designed for the Just Aircraft Superstol and Highlander. The older models with the small hinge bushings wont work. These are made for the tail feathers that have 7/16in OD hinge bushings Price includes shipment to lower 48.