Norscot propeller shaft seals are drip less, so there is no leaking or spraying of seawater into the bilge, as with conventional packing boxes. They are made for direct replacement of your present packing box. They are cooled and lubricated by a self-contained oil supply (AFTDexron) for virtually no friction or wear. Norscot Shaft seals are available to fit
shaft sizes from 3/4 to 3 inch.