ACU-MAX™ Flange - Stainless Steel Backing Ring - Table E Stainless Steel Backing Ring drilled to work with ACU-MAX™ Flanges Range of Sizes Available:200mm Drilled to Suit 250mm ACU-MAX™ Flange250mm Drilled to Suit 315mm ACU-MAX™ FlangeACU-MAX™ Flange - Stainless Steel Backing Ring - Table ESize in mm*Select