Hyperion Hi-Scale Aerobatic Spinners. Very light and true-running; made of tough ABS platic in a beautiful gloss finish. Available in RED. WHITE, and BLUE to match standard covering colors. Each spinner comes with two precision adapter rings. Finally there are spinners that have cut-outs large enough to fit your props. 32mm fits up to 11" E props, 40 and 52mm spinners up to 14" props, and the 63mm fits up to 19" prop depending on type, and even some 20" props. Hyperion