CG, CGI, R, RIR styles with inner and outer rings.
Octagonal R, Oval R, RX, BX rings to API 6A flanges.
Compressed fibre, graphite, or PTFE sheet stock.
Serrated metal core with soft facing for tight seal at low load.
Serrated core with PTFE or graphite facing for chemical service.
Full dimensional check to ASME B16.20 / B16.21.
PMI on metallic windings and rings.
Compliance markings per ASME (size, class, material, manufacturer).
Heat-number traceability through MTR.