This sheave box, made of aluminium, offers a wide range of options for customization according to your specific needs. With a simple removable axle pin, maintaining and switching out sheaves is easy. The durable cast aluminium construction ensures long-lasting performance, while the three different sheave materials and bearing options provide versatility for various applications. From sailboat masts to boat decks, this sheave box is designed to handle rope and wire pass-through with ease. Choose from lightweight Acetal Plain Bearing, low-friction Stainless Steel Dynamic, or heavy-duty Stainless Steel Plain Bearing for your maximum working load needs.