This 2mm pure dyneema cord is used for wishbones on shark fin shafts. 
 
Dyneema® is one of the world's strongest fibres. The fibre has extremely good dynamic properties, is not affected by water, and has excellent durability, ultraviolet light stability and overall versatility. It is not surprising that today's best performing spearfishing equipment is using Dyneema fibre.
 
Sold per meter.