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 Walnut Blocks 9/32″ (7 mm) (15 per package)

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

Single Sheave Walnut Sister Block 5/16″ (8 mm) (4 per package) Blocks act as pullys used in conjucti