Product Information Style: V-Ring Pressure Seal: Buna-N Dust Seal: Buna-N Grease: Standard Ball Bearings: Carbon Steel Select a Product Part NumberMaterialRetainerSize 410FGXFGCS00100Carbon SteelAluminum4" 310FGXFGSS00200Stainless SteelPTFE3" 310FGXFGCS00100Carbon SteelAluminum3" 610FGXFGCS00100Carbon SteelAluminum6"