High Grade Cork / BUNA-N (Nitrile) Gasket Material 6.5" X 44" x 1/8" THICK Cork/buna-n material is a composite material that's good for a variety of applications, including sealing, automotive, and fuel pump applications: Sealing: Cork/buna-n material is a versatile, compressible material that can be used in a wide range of sealing applications.
eBay