STAINLESS STEEL WELDING FITTINGS ISO SERIES Types Elbows, equal and reducing tees, concentric and excentric reducers, caps, lap joint stub ends Standards/Grades ISO 5251 types Z2CN 18-10 and Z2 CND 17-12 Dimensions / Tolerances / Testing (according to Standard) Outside Diameter: 23.1 mm to 106 mm Finishing - Certification 2.2 according to EN 10 204 Accessories - Applications General purposes Clean fluids, corrosion For use with "ISO series" pipe