Lincoln K and KP Numbers › Lincoln Electric KP3541-180 GUN TUBE ASSEMBLY 180 DEGREE AIR COOLED Lincoln Electric KP3541-180 GUN TUBE ASSEMBLY 180 DEGREE AIR COOLED Sale Price: $306.54 Original Price: $343.32 GUN TUBE ASSEMBLY 180 DEGREE AIR COOLED PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! GUN TUBE ASSEMBLY 180 DEGREE AIR COOLED PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000