Copper gasket has two rolled ridges in it so multiple gaskets will register against one another and prevent slip. Gasket measures 2.010" O.D. x 1.410" I.D that should work with most Hemi, BBC, SBC or 481x mag drives in the industry.
Gaskets are sold in a ten pack so you can get up to .100" height in one kit. Perfect to keep at the shop when putting together motors.