Brand New high quality copper gasket that performs well and is reusable.
We recommend this in all of your racing and high performance applications.
They are for stock heads unless indicated, and work well in high heat and turbocharged applications.
 Copper-Seal Material, 

Small Block Ford 289-351W Rectangle 1.12" x1.48" port

These Are Made From .043 Solid Copper
 
Seals Minor Surface Irregularities
Made From Indead Soft Copper In