This is aluminium billet head, machined and bored out in perfect alignment of jet hole vents in the right places. 
The smoke trail is 25 feet long but at 185 grams in head weight 
The 12.5 inch likes a little speed.  9.5 to 14 knots even faster in other parts of the world with speed trolling systems. Even though Blue marlin have been caught on this biggest of the models we find it a great lure for Big Yellowfin tuna and large wahoo and big 
Mahi Mahi