Lincoln Service Parts 2 › Lincoln Electric 9SS21400-40 RATING PLATE (ALT FREQ 1) S21400-40 Lincoln Electric 9SS21400-40 RATING PLATE (ALT FREQ 1) S21400-40 Sale Price: $45.12 Original Price: $51.89 RATING PLATE (ALT FREQ 1) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! RATING PLATE (ALT FREQ 1) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1