Lincoln K and KP Numbers › Lincoln Electric KP4631-1 O-RING KIT Lincoln Electric KP4631-1 O-RING KIT Sale Price: $4.73 Original Price: $5.30 O-RING KIT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! O-RING KIT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000