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2''x4'' STD ASTM A403 WP321H Butt Weld Eccentric Reducer B16.9 Product Description 1.Material Grade: ASTM A403 WP321H 2. Size: 1''-24'' 3. Standard: ASME B16.9 4. Certification: SGS/BV/ABS/LR/TUV/DNV...