Lincoln Service Parts 2 › Lincoln Electric 9SS31741 THREE ARM KNOB S31741 Lincoln Electric 9SS31741 THREE ARM KNOB S31741 Sale Price: $14.25 Original Price: $16.39 THREE ARM KNOB PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! THREE ARM KNOB PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1