Lincoln Service Parts 1 › Lincoln Electric 9SM22690 REGULATOR KNOB M22690 Lincoln Electric 9SM22690 REGULATOR KNOB M22690 Sale Price: $3.38 Original Price: $3.89 REGULATOR KNOB PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! REGULATOR KNOB PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1