The 3/0 thread is multi-filament thread, suitable for flies larger than size 12. The 6/0 and 8/0 thread is made of continuous polyester filaments slightly bonded - the filaments are not twisted and tie virtually flat on the hook.
Colours: 13 (not all avail all strengths)
Strengths: 72 denier (8/0), 135 denier (6/0), 180 denier (3/0)
Length: 200 yd (except 3/0 - 100yd)