Harken Sail Chafe Protectors, 102530 Speeds_1-Speed Commonly 75mm blocks are for

Commonly 75mm blocks are for the main and spinnakers on larger FJs

Zircon blocks are the most efficient small boat blocks Harken has ever made

not a textured surface

Forged stainless steel shackles are polished to a high luster and are stamped with the screw pin diameter

Textured surface emphasizes tough

Harken Sail Chafe Protectors, 102530 Speeds_1-Speed Commonly 75mm blocks are forHarken Sail Chafe Protectors are simple yet effective rigging accessories designed to protect sails from abrasion where they pass over wire rigging, shrouds, spreaders, or backstays. They consist of two interlocking halves that snap around standing rigging to create a smooth, low friction roller surface, helping headsails and mainsails glide past potential chafe points during tacks and gybes. By reducing wear on sailcloth and halyards, these