Lincoln Service Parts 2 › Lincoln Electric 9SS21400-42 RATING PLATE (ALT FREQ 3) S21400-42 Lincoln Electric 9SS21400-42 RATING PLATE (ALT FREQ 3) S21400-42 Sale Price: $45.12 Original Price: $51.89 RATING PLATE (ALT FREQ 3) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! RATING PLATE (ALT FREQ 3) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1