The invention relates to a filter comprising membranes made of hollow fibers in which the hollow fibers are arranged as a bundle in a tubular housing. The housing comprises an end cap on each of its ends, whereby the hollow fiber bundle is placed between the ends of the housing. The ends of the hollow fiber bundle each comprise a support ring that surrounds the same and are cast inside said support ring. The support rings are displaceably mounted in the housing in order to compensate for, among other things, axial contractions of the hollow fiber bundle occurring during heat sterilization.