Barton Block Single Spinnaker Lead
| Size 1 | |
| Weight | 59 g |
| Dimensions | 107 × 32 × 25 mm |
| Sheave Size | 30mm x 12mm (1 3/16″ x 15/32″) |
| Max rope diameter | 8mm (5/16″) |
| SWL | 355kg (782lbs) |
| Break load | 710kg (1565lbs) |
| Max rolling load (ball bearing blocks) | 245kg (540lbs) |

