Lincoln K and KP Numbers › Lincoln Electric KP2745-040R CONTACT TIP, EXTENDED LIFE, 550A, .040 Lincoln Electric KP2745-040R CONTACT TIP, EXTENDED LIFE, 550A, .040 Sale Price: $4.96 Original Price: $5.56 CONTACT TIP, EXTENDED LIFE, 550A, .040 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! CONTACT TIP, EXTENDED LIFE, 550A, .040 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000