... : 1) Sanitary stainless steel IDF union 2) Material: 304, 316, 316 Sanitary IDF UnionFeatures: 1) Sanitary ... ", 2", 2.5", 3", 4" 4) Seal: EPDM, silicon, vitonIDF union is composed of IDF-13 hexagonal, IDF-14 welded liner ... of products is complying with the FDA standard. Sanitary IDF Union