This is a package of sixteen Align Tail Blade Spacers, which provides improved contact patch between the tail rotor grip and the tail rotor blade, and minimizes scratches on the surface of the tail blade.
This product was added to our catalog on September 27, 2016
Stated was compatible with a Trex 550L, well they go on so hard that you're basically running locked tail blades. Even with the tail blade screws loose as can be the blades take a huge amount of force to move. I wouldn't recommend these if anything they will scratch your paint on the tail blades. Also, just installing the clips takes a ton of force to slide them in place if you can get them in at all.