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Nitrile rubber (NBR, Buna-N) is a very common material for gaskets. This material is specially formulated for its whiteness and is used extensively in food and pharmaceutical environments. All materials are made with FDA approved ingredients per 21CFR 177.2600. White in color.

Nominal Pipe Size: 1-1/4
Pressure Rating (lbs): 150
Flange Standard (ASME): ASME B16.5
Thickness (In.): 1/16
Inner Diameter (In.): 1.660
Outer Diameter (In.): 4.630