Item No.: SSUEFL204 EHB~SSUEFL212 EHB, SSUEFL204 ESB~SSUEFL212 ESBSSUEFL..EHB/ESB All stainless steel 2-bolt flange,Hollow/Solid base housing,Concerntric lockingPhone: +86-592-580 8851 / +86-592-580 7618Email: sales@ldk-bearing.com ; benjamin@ldk-bearings.com