Our fluorocarbon comes in 8, 10, 12, 16, 18 and 20 pound test and come with convenient elastic bands to keep the tippet in check. 30 meters per spool. The diameters are:

8 pound: 0.235mm, 10 pound: 0.260mm, 12 pound: 0.285mm, 16 pound: 0.330mm, 18 pound: 0.370mm, 20 pound: 0.405mm

How strong? Not super strong. Mega strong. What does that mean? You'll just have to try it and find out.