Max line Ø12mm. Length: 132mm. Disc: Ø57mm| SWL: 2200 kg. Breaking strength: 4400kg. Weight: 378g| Harken's Black Magic blocks are strong, light and smooth running, and | are also called Harken's workhorses due to their high| strength-to-weight ratio, and extremely smooth running. It is the must-have| block, whether you sail locally or globally.| With Torlon roller bearing. Delrin balls in the sides take the load| sideways. Side plates and disc are hard-anodized and Teflon-| coated aluminum. Can be completely disassembled by loosening three screws, | without loose balls.
