... Concentric Reducer 1)Standards: DIN, SMS, ISO, IDF, 3A, BS 2)Material: AISI316L,AISI304 3)Size: DN15-DN100,1/2"- 4" Sanitary Concentric ... ,Sanitary butterfly valve,Sanitary check valve,pipe fittings,Tee,Elbow,Concentric/Eccentric Reducer,Cross,Coupling,Union ect. Sanitary Concentric Reducer