Lincoln Electric 9SS18697-55 S18697-55 CONTROL KNOB & SET SCREW Sale Price: $31.98 Original Price: $36.78 CONTROL KNOB & SET SCREW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Quantity: Add To Cart Added! CONTROL KNOB & SET SCREW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1