Features precision turned Ertalyte sheaves running on a large diameter centre bearing, for friction-free performance under load. Sheaves are designed with extra width to accept two sheets. The sheave axle is through-bolted and riveted for extra strength.
| Length | Width | Height | Sheave Ø | Max Rope Ø | Weight |
| 80 mm | 42 mm | 87 mm | 40 mm | 2 x 12 mm | 2280 g |