FR4 Low Friction Ring ( 316L Stainless Steel), Tylaska Marine And Aerospace, Mfr#: FR4-SS

Low Friction Rings are ideal for applications such as barber haulers, spinnaker twings or other uses that have small turning angles and little line movement. They also work great for backstay adjusters when used in a high purchase cascade configuration. Ferrules start having frictional heating and wear problems when there is significant line movement so conventional pulleys are still better for applications such as mainsheet and halyard blocks.