Lincoln Service Parts 1 › Lincoln Electric 9SL11566-5 HARMONIC FILTER L11566-5 Lincoln Electric 9SL11566-5 HARMONIC FILTER L11566-5 Sale Price: $2,157.78 Original Price: $2,481.45 HARMONIC FILTER PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! HARMONIC FILTER PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1