#10 thread, 1/4" space between rings.
1. 4- 4- 4- 4 close ring.
2. Sm. ring 4-' 4 close ring.
3. 4+ 4- 4- 4 close ring.
4. 4+ to sm. ring 4- 4- 4 close ring.
5. 4+ to a 19. ring 4- 4- 4 close ring.
6. 4+ to 19. lower ring 4 close ring.
7. Repeat