This Great Planes 1-Piece Red Nylon Spinner with Aluminum Backplate.
Red nylon spinner. Aluminum backplate. Fits 2-blade spinners. A sturdy aluminum backplate holds the spinner in round, which means it turns truer, with less vibration. The engine shaft hole is stepped from 5/16 in. to 1/4 in., to perfectly center the opening if enlarging is needed. Spinners attach securely to backplates with the included screws.