Callibaetis Poly-Wing Spinner

Hook: Light-wire, 1X-long dry-fly hook, size 16 to 12.
Thread: Gray 8/0 (70 denier) or 6/0 (140 denier).
Tail: Medium blue-dun hackle fibers.
Body: Any buoyant synthetic medium or light gray dubbing.
Wing: Gray polypropylene yarn.