Great looks, and quality that holds up. BB makes a very nice yet affordable spinner for your folding props.
Aloft Hobbies carries all spinners in a 4mm shaft size (except as noted). To adjust to a different shaft diameter, we sell collets to fit 3mm, 1/8", 4mm, and 5mm shafts.
Yoke size: 8mm (standard folding prop root width)
Shaft Size: 4mm (addition collets available)
Diameter: As listed above.