Bung Omar!
Maksudnya WTF ini mungkin anda maksud WFT! Ini berarti weight forward taper.
A flyline terbagi 3 sectie: a.Weight of the line
b.The taper, the type of flyline
c. Function, floating or sinking.

For casting a flyline & rod you need loading a certain weight outside your rod! So the first 30 feet( 9,52m) is your working part of your flyline! So according AFTMA( American Fishing Tackle Manufacturers Associations),table:
AFTMA Grains Grams(the first 30')
#1 60 4
2 80 5,5
3 100 6,5
4 120 8
5 140 9,5
6 160 10,5
7 185 12,5
8 210 14
9 240 16
10 280 18,5
11 330 22
12 380 25,5
This goes up to# 16 I even heard about # 20?
Ini tidak bisa dicompare sama mono, mungkin anda maksudnya Lain?
Perkara leader sudah saya jelaskan di Flyfishing di Indonesia, kalau perkara rules IGFA lain lagi.Saya silahkan Jim untuk menjawab pertanyaan yang lainnya.Sorry, kalau kurang jelas atau salah paham!
Any questions,please do!
Jim! I am sorry! for interrupting before you finished! May be you can give the correct answers in case I misunderstood Mr. Okuma.
Regards,
Victor Loppies.