Harken ESP 57 mm single block with swivel and dog collar. | in polished stainless steel.| 57 mm Delrin disc with ball bearings.| Max line 16 mm| Max. Working load 1,000 kg. | Breaking strength 2,000 kg.| ESP is a series of blocks that complement the other| Harken series in design and function, but are simple in design | and construction. | The disc has Carbon Delrin balls that take the light | load horizontally and laterally. At high static | loads, these are taken up by the large stainless | center plain bearing. | ESP are ideal as mast foot blocks and are available in | many variants.
