Double Sheave Walnut Blocks 5/32″ (4 mm) (15 per package) Blocks act as pullys used in conjuction with the miles of line that make up the running rigging. They multiply the force exerted by the crew, enabling yards and sails to propel ships 2000 tons or larger.

Double Sheave Boxwood Blocks 3/16″ (5 mm) (15 per package) Blocks act as pulleys used in conjunction with the miles of line that make up the running rigging. They multiply the force exerted by the crew, enabling yards and sails to propel ships 2000 tons or larger.

Trilple Sheave Walnut Blocks 3/16″ (5 mm) (10 per package) Blocks act as pullys used in conjuction w