JINKAI Stainless Steel Springs slide over monofilament line or cable to provide superior abrasion protection. Hooks and swivelsglide smoothly overthese non-corroding springs. Available in: 50/pkg.Spring/Line Coordination Chart I.D. Size       JINKAI Line        Line Diameter         50/pkg.          1000/pkg.    1.80mm        400 lb. test             1.81mm                 SS1.8-50       SS1.8-1000 1.60mm  250-300 lb. test      1.47-1.56mm             SS1.6-50       SS1.6-1000 1.40mm  175-220 lb. test      1.28-1.38mm             SS1.4-50       SS1.4-1000 1.20mm  130-150 lb. test      1.04-1.17mm             SS1.2-50       SS1.2-1000