Double Filter, Welded Filter, Sanitary Filter SS304, SS316 Standard: ISO, DIN, IDF, SMS,3A Size: 1"-4", or required Double Filter, Welded Filter, Sanitary FilterMaterial quality: SUS304, SUS316Standard: ISO, DIN, IDF, SMS,3A Size: 1"-4", or requiredSeal material: PTFE,EPDM Double Filter, Welded Filter, Sanitary Filter