Lincoln Electric has obsoleted p/n FJW5-AG shunt coils. Original Lincoln coils were very cheaply made, with aluminum wire painted to look like copper, wound on a sheet-metal bracket, and covered with paper insulation. 
 
Weldmart's version of these coils is wound on a rigid, industrial plastic one-piece "bobbin"; the mold to make this bobbin cost $30,000 30 years ago. It will not absorb moisture. 
 
These coils are sold with an "across the counter" warranty for 10 years. When we install them in our shop, we extend that warranty to "lifetime for the original purchaser". 
 
Normal ground freight paid  by Weldmart.