Product Details + Part No. 128Sheave Ø (mm)38 mmSheave Ø (in)1 1/2 inMaximum line Ø (mm)10 mmMaximum line Ø (in)3/8 inMaximum working load (kg)272 kgMaximum working load (lb)600 lbLow-friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A range of styles lets these blocks adapt to almost all control line applications.