For efficient and low maintenance systems that do not require friction reduction, the Allen 20mm Plain Bearing Block with Hook is the perfect choice. This block is made from recycled plastics and features a durable acetal sheave that rotates around a central axle. Additionally, the built-in hook allows for quick and easy attachment, making it ideal for use in outhaul and cunningham systems. However, for maximum performance, we recommend considering our Dynamic block range as an alternative option.