Finish Dishwasher Salt Box 4kg (Pack of 4) 3227616Finish Dishwasher Salt is especially designed to prevent limescale build up in your dishwasher which can cause poor performance. Salt also effectively softens water to ensure better cleaning performance of your detergent, preventing white residue marks from hard water on your glasses and dishes. Each pack contains 4kg. 4 packs supplied. Designed to prevent limescale build up in the machine Boosts dishwasher detergent performance Prevents residue