WSB Specimen Mono is a monofilament fishing line which is ideal for all round sea fishing. This line features low diameter to breaking strain and high knot strength. It is low stretch meaning it is effective at setting hooks and also has high abrasion resistance. WSB Specimen Mono is light blue in colour and available in three different breaking strains 15lb, 20lb and 30lb which are all available on 250 metre spools.