TUPHblox are made from a phenolic resin laminate with cotton reinforcement commonly known as Tufnol. It is strong durable and lightweight. All blocks are made with stainless steel (316) bindings and run on brass bearings
| Size 1 | Size 2 | |
| Weight | 63 g | 85 g |
| Max rope diameter | 10mm (3/8″) | 12mm (1/2″) |
| Sheave Size | 30mm (1 3/16”) | 35mm (1 3/8”) |
| Break load | 700kg (1543lbs) | 740kg (1630lbs) |
| SWL | 350kg (771lbs) | 370kg (815lbs) |
| Brand | Barton | Barton |
| No. of Sheaves | Single | Single |
| Block Type | Swivel | Swivel |

