RECOMMENDED SPHERES
| Article 15 | 1/2" | 3/4" | 1" | 1"1/4 | 1"1/2 | 2" |
| Article 19.4 | 120 | 150 | 180 | 220 | 220 | 300 |
| Article 20.2 | 120 | 150 | 180 | 200 | 220 | 250 |
| Article 21.2 | 130 | 160 | 160 | 220 | 220 | 240 |
| Article 15 | 1/2" | 3/4" | 1" | 1"1/4 | 1"1/2 | 2" |
| Article 19.4 | 120 | 150 | 180 | 220 | 220 | 300 |
| Article 20.2 | 120 | 150 | 180 | 200 | 220 | 250 |
| Article 21.2 | 130 | 160 | 160 | 220 | 220 | 240 |