Max line Ø10mm. Length: 71mm. Disc: Ø45mm| SWL: 750 kg. Breaking strength: 1500kg. Weight: 82g| Runner block for running backstays.| Harken's Black Magic blocks are strong, light and easy to run, and | are also called Harken's workhorses due to their high| strength/weight ratio and extremely easy 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.
