Harken's Cruising ESP Blocks complement existing Harken blocks in regard to looks and functionality, but have a simpler design and construction. The sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising blocks.
Technical Specifications:
| Sheave Diameter | 57mm | 75mm |
| Length | 140mm | 159mm |
| Weight | 218g | 340g |
| Maximum Line Diameter | 16mm | 19m |
| Maximum Working Load | 1000kg | 1587kg |
| Breaking Load | 2000kg | 3175kg |
| Shackle Pin Diameter | 8mm | 8mm |


