Harken Cruising ESP 57 mm block sheave in Delrin| with ball bearing. | Height 21 mm| Max line 16 mm| Max. working load 1,134 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 sheave 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.
