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Garlock Fluid Sealing Product 37704-0104
BLUE-GARD® Ring Gasket - 3400 Style, Gray/Black, Aramid Fiber with SBR Binder, Branded, 0.063 in Thick, For 4 in, ASME B16.5 Class 150, AWWA C207 Class E, Class D, Class B Pipe Flanges