Daiwa Sensor Monofilament 300m 4lb has a reputation for exceptional reliability and a rugged performance._ Sensor has delivered amazing durability, suppleness, consistent diameter and superb knotting and is probably the most popular mainline in the UK today._ Can be used as mainline or hooklength material for specialist fishing._(Please note image shows 15lb, see below for correct breaking strain.)_BS 4lb.Spool size 300m.Diameter 0.20mm._