48 RING, RETAINER, METALLIC, SIZE: 4" NPS, CL 300#, A516 GR.60-N, NACE MR-0175, EPOXY COATED (DFT :200 MICRONS, PCS-1), ROTO TO ROTO, WIDTH= 13 MM, ID= 160 MM, OD= 173 MM 411.00 EA 49 RING, RETAINER, METALLIC, SIZE: 4" NPS, CL 300#, A516 GR.60-N, NACE MR-0175, EPOXY COATED (DFT: 200 MICRONS, PCS-1), ROTO TO BARE, WIDTH= 8 MM, ID= 160 MM, OD= 173 MM 387.00 EA 50 RING, RETAINER, METALLIC, SIZE: 2 NPS, CL 300#, A516 GR.60-N, NACE MR-0175, EPOXY COATED (DFT: 200 MICRONS, PCS-1), ROTO TO BARE, WIDTH= 7 MM, ID= 95 MM, OD= 103 MM 315.00 EA