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

and in its original packaging

not a textured surface

That's why Harken offers these easy conversion kits

The caulk sausage takes a special caulking gun to handle the large volume of material

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