Lincoln Service Parts 2 › Lincoln Electric 9SS31898-7 KNOB [2] S31898-7 Lincoln Electric 9SS31898-7 KNOB [2] S31898-7 Sale Price: $3.70 Original Price: $4.26 KNOB [2] PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2 Add To Cart Added! KNOB [2] PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2