Amra SpA - 4001-DC-42 - RPB48 referenced Retaining spring product produced by high technology. 4001-DC-42 - RPB48 became irreplaceable of foundations. 4001-DC-42 - RPB48 referenced product which is satisfy the customer's needs, offers advantages of quality and cost. It produced result of tests of laborotory for years. 4001-DC-42 - RPB48 referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.