The Allen 16mm Acetal Sheave Cheek Block features a single plain bearing and a lightweight, cost-effective design. Perfect for low loaded systems, such as control line bungee take-ups or rope guides, this block is designed for durability and minimal maintenance. The acetal sheave rotates around a central axle, ensuring a long lifespan. The block's lightweight strap is made of stainless steel for a strong yet lightweight frame. This cheek block is ideal for securely attaching to a flat surface, making it perfect for guiding lines along a deck, around corners, or into a cleat. It is held in place by two screws, one through the middle of the sheave and the other through the top rivet.