Here are the number I can remember

I-20 mast = at minimum 18 kg or 39 lbs (this number could be just the mast blank)
Taipan / alu F16 mast fully fitted = 15.5 kg = 34 lb
F16 carbon = min 13 kg = min 29 lbs
FX-one alu mast fully fitted = 20 kg = 44 lbs
I-17 carbon = I can't remember the number but it was heavier than the Taipan alu.
A-cat = just under 10 kg fully fitted = just under 22 lbs