Duff Norton - R400S 21/740303 GD referenced ROTARY UNION product produced by high technology. R400S 21/740303 GD became irreplaceable of foundations. R400S 21/740303 GD referenced product which is satisfy the customer's needs, offers advantages of quality and cost. It produced result of tests of laborotory for years. R400S 21/740303 GD referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.