This strainer screen is for use with 1rne1, 1rne9. It is compatible with the following model numbers/series: 11/4 581 CS srewed end, 11/4 582 CS socket weld. In addition, it meets the standards for ASSE, CSA, FM, NSF, UL, ULC, USC, and WQA. It measures 5 inch length, with a spiral wound graphite filled seal.