Schaefer Series 7 Flat Base/Aluminum Cheek/Delrin Sheave

The Schaefer Series 7 Flat Base/Aluminum Cheek/Delrin Sheave is a precision block designed for sailors and boaters who require reliable line management in marine conditions. This sheave is essential for directing halyards, sheets, and other running rigging with minimal friction and maximum durability, making it ideal for racing sailboats, cruisers, and commercial vessels.

Constructed to Schaefer Marine's high standards, this block features a flat aluminum cheek base and a Delrin sheave, a composite polymer that reduces friction and resists corrosion. The flat base design allows for secure mounting on decks, booms, or masts without protruding hardware, which helps streamline your rig while preserving valuable working space.

Sailors upgrading their rigging systems or building custom control lines will find the Schaefer Series 7 block particularly beneficial. Its lightweight design, weighing just 0.65 lbs and measuring 3 x 1 x 6 inches, ensures that it does not add unnecessary windage or weight aloft, which is critical for performance sailing and fuel-efficient boating.