... )Product name: Sanitary Sight GlassType: Clamped endsMaterial quality: AISI304, AISI316LStandard: DIN, ISO, IDFSpecification: DN25-DN100 & 1"-4", applied to the stainless ... kinds of sanitaryvalves and fittings. Such as butterfly valves, check valves, ballvalves, diaphragam valves, sample valves, stop reversing valves, reliefvalves, bends, tees, reducers, unions, ferrules, etc ...