The Harken 29mm In-Line Exit Bullet Block Part No. 089 is designed with a sheave diameter of 29 mm (1 1/8 in) and can accommodate a maximum line diameter of 8 mm (5/16 in). With a maximum working load of 181 kg (400 lb), these low-friction bullet blocks are ideal for leading control lines aft. Their compact and lightweight design allows for fast trimming and releasing under high or low loads. Choose from a range of styles to suit a variety of control line applications.