The Viper 640 Jib Tensioning system has two parts -- a primary length, V640180, made with 1/8 in Samson Amsteel Blue that connects with the tensioning blocks below decks takes the majority of the tensioning load. This length has an eye splice in both ends.
This second length, the control length, is what you'll use to add/ease tension on the jib halyard; We make these with 5/32 in (4mm) Alpha Ropes SSR for ease of handling. This length has end whips on both ends for durability.
Line: Alpha Ropes SSR - High Performance, Dyneema SK-75/Cordura single braid; minimal stretch; low water absorption; durable.