The 30mm exit sheave box is a high-performance solution that enhances the efficiency and durability of your rigging system. It features a readily removable axle pin for easy maintenance or replacement of sheaves, which can be secured by the surface on which the box is mounted or by the included curved backing plate. This versatile solution is ideal for sailboat masts and can also be used on boat decks or any other surface requiring the passage of rope or wire. Key Features: Sturdy Construction: The body is precision-machined from marine-grade aluminium to ensure long-lasting performance. Various Sheave Options: Choose from three sheave materials and bearing options to suit your specific needs. Versatile Compatibility: Compatible with a wide range of mast sizes and applications. Comes with a curved backing plate for mounting on the leading edge of a mast. Optimised Rope Protection: Reduces wear and tear on halyards for extended rope lifespan. Sheave Options: Acetal Plain Bearing: A lightweight, low-m