Groups of two to six sheaves in 4 diameters of 30, 40, 50 and 70 mm.
The sheave is manufactured in high-strength resin and slides on a double ball bearing.
The fairing is thickly-anodized for all models.
The weight-reducing holes and special "low head" screws reduce weight and friction.
A special design with larger sheaves can also be made on request.
