Feva elastic is the latest 2nd generation hybrid elastic, it gives for example, the strength of an 8-10 elastic with the action of a forgiving 4-8. Because of this we give a strength and action guidance on each packet. Available in six grades to cover all usage situations. It is super strong with a 700% stretch ratio resulting in a smooth liquid forgiving action, which means fewer bumped fish. AVAILABLE IN THE FOLLOWING ACTION RATINGS: 4-6 ø1.2mm, 6-8 ø1.4mm, 8-10 ø1.6mm, 10-12 ø1.8mm, 12-14 ø2.0mm, 16-18 ø2.2mm