NGP 6000 Composite End Rings NGP 6000 are designed to prevent migration of the 6300J flexible graphite. Graphite packing arrangements that utilize Style 6000 end rings offer the ultimate in packing performance and reliability. Increased cycle life and reduced packing friction are the major benefits of utilizing NGP 6000 composite end rings. Nuclear Graphite Products (NGP) Main Page NGP 524 Graphitic Yarn Page NGP 6300J Flexible Graphite Seal Rings Page NGP Belleville Spring Washers Page NGP 193 B-7 Gland Studs Page NGP Style 6350 Graphite Lubrication Page NGP 6000 Composite End Rings Page NGP 5005 Graphite Spacer Bushings Page