Lincoln Service Parts 1 › Lincoln Electric 9SM5090-C RHEOSTAT M5090-C Lincoln Electric 9SM5090-C RHEOSTAT M5090-C Sale Price: $449.20 Original Price: $516.58 RHEOSTAT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! RHEOSTAT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1