Lincoln Service Parts 1 › Lincoln Electric 9SFC0046020040 AIR REGULATOR WITH GAUGE MF400 FC0046020040 Lincoln Electric 9SFC0046020040 AIR REGULATOR WITH GAUGE MF400 FC0046020040 Sale Price: $193.24 Original Price: $222.23 AIR REGULATOR WITH GAUGE MF400 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! AIR REGULATOR WITH GAUGE MF400 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1