Converta Sleeve Inserts are sized to fit inside Fiberglass Tubing, ProSpars, SkyShark non-tapered spars, Avia G-Force and Excel spars. They are used to prevent the hollow ends of the tubes from crushing. Available in one size; be sure to check your inside diameter before ordering.
We are starting to run low on these items and they probably will not be replaced unless there's a hew & cry.