Types:1--Basic type.(only filler)2--With inner ring.3--With outer ring4--with inner&outer ringMaterials:rings: 304L, 304ss, 306L, 316ss, 321, inconel, etcfillers:graphite, asbestos, ceramic, PTFE, etc.Size:For Rings:3.0, 4.5mm For Filler:4.5, 6.5mm Other size can be negotiated.lynne at...