An Eccentric reducer, also called a Bell reducer, has two female (inside) threads of different sizes with centers so designed that when they are joined, the two pieces of pipe are not in line with each other, but they can be installed so as to provide optimum drainage of the line.
Materials:
Carbon steel: ASTM A234 WPB, WPC, ASTM A420 WPL1, WPL3, WPL6 and WPHY-42/46/52/56/60/65/70
Stainless steel: ASTM A403 WP304/304L, WP316/316/L, WP321, WP347 and WPS31254
Alloy steel: ASTM A234 WP1/WP12/WP11/WP22/WP5/WP7/WP9/WP91
Duplex and super duplex steel: ASTM A815 UNS S31803/S32750/S32760
Pressure: SCH5 to SCH160
Standard: ANSI B16.9/B16.28 and MSS SP-43/SP-75
Size range: 1/2" NB to 56"NB
Surface treatment: Shot blasted, Black anti-rust oil