ST Line is now recognised by many top anglers as the most durable & abrasion resistant line out there. Multiple times tougher than most, the ST also has an ultra low memory & over repeated period of use it maintains its slick surface texture. In tests it was exposed to deliberately rough treatment incurring cuts & surface nicks but still maintained its remarkable strength._ Please note that the image shown may differ...see below for correct breaking strain.)__ Breaking strain 5lb. Spool size 300m. Diameter 0.19mm. High abrasion resistance. Slick surface texture. Super high knot strength. Ultra low memory.