Harken%26reg%3B%20Lead%20Rings%20are%20simple%2C%20weight-saving%20devices%20used%20to%20route%20line%20for%20jib%20in-haulers%2C%20twings%2C%20barberhaulers%2C%20lazy%20jacks%2C%20cascading%20backstays%20and%20other%20applications%20requiring%20minimal%20fine-tune%20adjustments.%20Rings%20are%20Hard%20Lube-anodized%206061-T6%20aluminum%20for%20a%20smooth%2C%20slippery%20surface%2C%20and%20with%20no%20moving%20parts%2C%20wear%20is%20minimal.%0D%0ASpecifications%26nbsp%3B%0D%0ACenter%20hole%20%26Oslash%3B%20(mm)%206%20mm%0D%0AOuter%20groove%20width%20(mm)%204%20mm%0D%0AWeight%20(g)%201.5%20g%0D%0A%26nbsp%3B%0D%0A%0D%0AResources%2FReferences%3A%0D%0ANeed%20help%20to%20design%20your%20Harken%20system%20-%20take%20a%20look%20here%20for%20the%26nbsp%3BHarken%20System%20Guides%20and%20Drawings%26nbsp%3BOr%20perhaps%20you%20need%20some%20other%20information%20(load%20calculators%2C%20block%20selectors%2C%20service%20instructions%20or%20manuals)%3F%26nbsp%3B%26nbsp%3B%20Take%20a%20look%20here%20for%20all%20the%20official%26nbsp%3BHarken%20Support%20Information