... Sub, Female Sub, Seal Ring; Sour Service Models to NACE MR-01-75. Recommended service Manifold ... Sub, Female Sub, Seal Ring; Sour Service Models to NACE MR-01-75. Recommended service General- ... Sub, Female Sub, Seal Ring; Sour Service Models to NACE MR-01-75. Recommended service Manifold ... Male Sub, Female Sub, Seal Ring; Sour Service Models to NACE MR-01-75. Recommended service Cementing, fracturing ...