Lincoln K and KP Numbers › Lincoln Electric KP4746-M 17/18/26 MEDIUM BACK CAP Lincoln Electric KP4746-M 17/18/26 MEDIUM BACK CAP Sale Price: $14.43 Original Price: $16.16 17/18/26 MEDIUM BACK CAP PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000 Add To Cart Added! 17/18/26 MEDIUM BACK CAP PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 2.000