The Harken 75mm Carbo Air Block with Swivel - Fishing (Part No. 2660) has a maximum working load of 550 kg (1213 lbs). It is built to be durable, lightweight, and affordable, making it a preferred choice among anglers. With a 75 mm sheave diameter and maximum line diameter of 14 mm (9/16 in), this compact block pairs perfectly with the popular Harken Big Boat blocks. Its high performance and user-friendly design make it a reliable and efficient trimming tool.