Proco Series 233-L and Series 234-L Rubber Expansion Joints are designed for piping systems that experience large lateral offsets due to settlement. They are low-profile expansion joints, and are available in a triple-arch or quadruple-arch design, featuring a built-in reinforcing ring at the top of the arch to provide extra stability for lateral movement. Also available in a filled arch, the Proco Series FA233L and Series FA234L are designed specifically for piping systems that carry heavy solids.